Opinion polling for the 2015 Canadian federal election
This table provides a list of scientific, nationwide public opinion polls that were conducted from the 2011 Canadian federal election leading up to the 2015 Canadian federal election, which was held on October 19, 2015. For riding-specific polls see 2015 constituency polls.
Campaign period
Graphical summary
Evolution of voting intentions according to polls conducted during campaign period of the 2015 Canadian federal election, graphed from the data in the table below. Trendlines are local regressions, with polls weighted by proximity in time and a logarithmic function of sample size. 95% confidence ribbons represent uncertainty about the trendlines, not the likelihood that actual election results would fall within the intervals.
| Polling firm | Last date of polling |
Link | Cons. | NDP | Liberal | BQ | Green | Margin of error[1] |
Sample size[2] |
Polling method[3] | Lead |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2015 election | October 19, 2015 | HTML | 31.9 | 19.7 | 39.5 | 4.7 | 3.4 | 7.6 | |||
| Nanos Research | October 18, 2015 | 30.5 | 19.7 | 39.1 | 5.5 | 4.6 | ±3.5 pp | 800 | telephone | 8.6 | |
| Forum Research | October 18, 2015 | 30 | 20 | 40 | 6 | 3 | ±3 pp | 1,373 | IVR | 10 | |
| EKOS | October 18, 2015 | 31.9 | 20.4 | 35.8 | 4.9 | 5.6 | ±2.1 pp | 2,122 | IVR/telephone – rolling (1/3) | 3.9 | |
| EKOS | October 17, 2015 | 32.6 | 21.0 | 34.3 | 5.4 | 5.4 | ±2.4 pp | 1,621 | IVR/telephone – rolling (1/2) | 1.7 | |
| Ipsos Reid | October 17, 2015 | HTML | 31 | 22 | 38 | 4 | 4 | ±2.2 pp | 2,503 | online/telephone | 7 |
| Nanos Research | October 17, 2015 | 30.5 | 22.1 | 37.3 | 4.6 | 4.7 | ±2.2 pp | 2,000 | telephone – rolling (2/5) | 6.8 | |
| EKOS | October 16, 2015 | 33.3 | 21.9 | 33.7 | 4.7 | 4.1 | ±2.5 pp | 1,537 | IVR/telephone – rolling (1/2) | 0.4 | |
| Nanos Research | October 16, 2015 | 30.7 | 22.6 | 37.0 | 4.4 | 4.7 | ±2.5 pp | 1,600 | telephone – rolling (1/2) | 6.3 | |
| Léger Marketing | October 16, 2015 | 30 | 22 | 38 | 6 | 4 | ±2.1 pp | 2,086 | online | 8 | |
| Angus Reid | October 16, 2015 | 31 | 22 | 35 | 5 | 5 | ±2.2 pp | 2,022 | online | 4 | |
| Mainstreet Research | October 15, 2015 | HTML | 33 | 21 | 38 | 4 | 5 | ±1.4 pp | 5,546 | IVR | 5 |
| EKOS | October 15, 2015 | 32.8 | 22.7 | 34.0 | 3.4 | 5.1 | ±2.3 pp | 1,813 | IVR/telephone – rolling (1/3) | 1.2 | |
| Nanos Research | October 15, 2015 | 30.6 | 23.5 | 36.5 | 4.3 | 4.7 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 5.9 | |
| Forum Research | October 14, 2015 | 31 | 24 | 37 | 6 | 2 | ±3 pp | 1,438 | IVR | 6 | |
| EKOS | October 14, 2015 | 32.6 | 22.9 | 33.5 | 3.4 | 5.6 | ±2.6 pp | 1,438 | IVR/telephone – rolling (1/3) | 0.9 | |
| Nanos Research | October 14, 2015 | 29.4 | 23.7 | 37.1 | 5.0 | 4.3 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 7.7 | |
| EKOS | October 13, 2015 | 29.9 | 24.1 | 34.1 | 3.8 | 6.4 | ±2.9 pp | 1,179 | IVR/telephone – rolling (1/3) | 4.2 | |
| Nanos Research | October 13, 2015 | 29.2 | 24.5 | 36.1 | 5.2 | 4.3 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 6.9 | |
| Ipsos Reid | October 13, 2015 | HTML | 31 | 24 | 37 | 5 | 2 | ±3.0 pp | 1,349 | online | 6 |
| EKOS | October 12, 2015 | 31.1 | 20.6 | 35.6 | 3.2 | 7.5 | ±2.9 pp | 1,115 | IVR/telephone – rolling (2/3) | 4.5 | |
| Nanos Research | October 11, 2015 | 28.9 | 24.3 | 35.7 | 5.7 | 4.8 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 6.8 | |
| Innovative Research | October 11, 2015 | 30 | 22 | 38 | 3 | 6 | ±3.1 pp | 1,143 | telephone | 8 | |
| EKOS | October 10, 2015 | 35.5 | 19.0 | 33.1 | 3.3 | 7.4 | ±2.6 pp | 1,428 | IVR/telephone – rolling (2/3) | 2.4 | |
| Nanos Research | October 10, 2015 | 29.0 | 25.0 | 35.1 | 5.2 | 5.1 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 6.1 | |
| Forum Research | October 9, 2015 | 31 | 23 | 37 | 5 | 3 | ±3 pp | 1,427 | IVR | 6 | |
| Nanos Research | October 9, 2015 | 28.6 | 24.9 | 34.8 | 5.5 | 5.4 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 6.2 | |
| Angus Reid | October 9, 2015 | 33 | 25 | 31 | 6 | 3 | ±3 pp | 1,083 | online | 2 | |
| EKOS | October 8, 2015 | 33.7 | 20.4 | 33.8 | 3.5 | 7.2 | ±2.4 pp | 1,618 | IVR/telephone – rolling (1/3) | 0.1 | |
| Nanos Research | October 8, 2015 | 31.0 | 25.0 | 34.0 | 5.3 | 4.2 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 3.0 | |
| Innovative Research | October 8, 2015 | 30 | 24 | 35 | 5 | 5 | n.a | 3,417 | online | 5 | |
| Mainstreet Research | October 7, 2015 | HTML | 36 | 20 | 35 | 4 | 5 | ±1.3 pp | 5,630 | IVR | 1 |
| Léger Marketing | October 7, 2015 | 30 | 25 | 34 | 6 | 4 | ±2.1 pp | 2,087 | online | 4 | |
| EKOS | October 7, 2015 | 32.5 | 21.1 | 34.1 | 3.6 | 7.3 | ±2.3 pp | 1,753 | IVR/telephone – rolling (1/3) | 1.6 | |
| Nanos Research | October 7, 2015 | 31.6 | 24.2 | 33.5 | 5.6 | 4.6 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 1.9 | |
| Forum Research | October 6, 2015 | 31 | 26 | 35 | 4 | 3 | ±3 pp | 1,447 | IVR | 4 | |
| Abacus Data | October 6, 2015 | 33 | 24 | 32 | 4 | 5 | ±2.2 pp | 2,000 | online | 1 | |
| EKOS | October 6, 2015 | 34.1 | 21.4 | 32.3 | 4.0 | 6.9 | ±2.3 pp | 1,788 | IVR/telephone – rolling (1/3) | 1.8 | |
| Nanos Research | October 6, 2015 | 32.1 | 23.0 | 34.3 | 5.1 | 4.6 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 2.2 | |
| EKOS | October 5, 2015 | 35.1 | 22.2 | 30.9 | 4.0 | 6.6 | ±2.4 pp | 1,658 | IVR/telephone – rolling | 4.2 | |
| Nanos Research | October 5, 2015 | 31.5 | 23.1 | 35.0 | 4.9 | 4.6 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 3.5 | |
| Ipsos Reid | October 5, 2015 | HTML | 33 | 26 | 32 | 5 | 3 | ±2.9 pp | 1,441 | online | 1 |
| Nanos Research | October 4, 2015 | 31.0 | 22.8 | 35.6 | 4.8 | 4.7 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 4.6 | |
| Nanos Research | October 3, 2015 | 31.0 | 24.3 | 35.3 | 4.3 | 4.5 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 4.3 | |
| Nanos Research | October 2, 2015 | 30.5 | 25.1 | 34.6 | 4.5 | 4.8 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 4.1 | |
| Mainstreet Research | October 1, 2015 | HTML | 37 | 24 | 29 | 4 | 7 | ±1.4 pp | 5,197 | IVR | 8 |
| Innovative Research | October 1, 2015 | 29 | 29 | 31 | 5 | 6 | n.a | 1,562 | online | 2 | |
| Nanos Research | October 1, 2015 | 31.9 | 25.9 | 33.5 | 4.3 | 3.9 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 1.6 | |
| Léger Marketing | September 30, 2015 | 30 | 26 | 32 | 6 | 6 | ±2.1 pp | 2,107 | online | 2 | |
| Angus Reid | September 30, 2015 | 34 | 27 | 27 | 6 | 5 | ±2.5 pp | 2,021 | online | 7 | |
| Nanos Research | September 30, 2015 | 32.8 | 26.1 | 31.7 | 4.8 | 4.1 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 1.1 | |
| Forum Research | September 29, 2015 | 34 | 28 | 27 | 5 | 5 | ±3 pp | 1,499 | IVR | 6 | |
| Nanos Research | September 29, 2015 | 32.1 | 26.3 | 32.2 | 4.6 | 4.4 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 0.1 | |
| EKOS | September 29, 2015 | 33.4 | 25.6 | 26.7 | 5.3 | 7.8 | ±1.9 pp | 2,609 | IVR | 6.7 | |
| Nanos Research | September 28, 2015 | 32.6 | 27.0 | 31.4 | 4.4 | 4.0 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 1.2 | |
| Ipsos Reid | September 28, 2015 | HTML | 32 | 27 | 33 | 4 | 4 | ±3.0 pp | 1,354 | online | 1 |
| Nanos Research | September 27, 2015 | 33.0 | 26.9 | 31.6 | 4.2 | 3.6 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 1.4 | |
| Abacus Data | September 27, 2015 | 32 | 27 | 29 | 5 | 5 | ±1.6 pp | 3,814 | online | 3 | |
| Nanos Research | September 26, 2015 | 31.5 | 27.6 | 32.5 | 4.0 | 3.7 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 1.0 | |
| Nanos Research | September 25, 2015 | 29.6 | 30.3 | 31.8 | 3.1 | 4.5 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 1.5 | |
| Nanos Research | September 24, 2015 | 28.9 | 31.1 | 32.3 | 2.5 | 4.2 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 1.2 | |
| Innovative Research | September 24, 2015 | 31 | 29 | 28 | 3 | 8 | n.a. | 2,805 | online | 2 | |
| Forum Research | September 23, 2015 | 31 | 28 | 31 | 4 | 4 | ±3 pp | 1,557 | IVR | Tie | |
| Nanos Research | September 23, 2015 | 30.5 | 30.8 | 31.5 | 2.3 | 3.7 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 0.7 | |
| Léger Marketing | September 23, 2015 | 31 | 29 | 31 | 5 | 5 | ±2.1 pp | 2,115 | online | Tie | |
| Innovative Research | September 23, 2015 | 32 | 27 | 30 | 3 | 7 | ±2.5 pp | 1,784 | telephone | 2 | |
| Nanos Research | September 22, 2015 | 31.5 | 29.1 | 31.6 | 2.6 | 4.2 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 0.1 | |
| EKOS | September 22, 2015 | 35.4 | 24.5 | 26.3 | 4.2 | 7.7 | ±2.0 pp | 2,343 | IVR | 9.1 | |
| Nanos Research | September 21, 2015 | 31.3 | 29.4 | 30.3 | 3.4 | 4.6 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 1.0 | |
| Ipsos Reid | September 21, 2015 | HTML | 27 | 30 | 33 | 5 | 4 | ±3.4 pp | 1,103 | online | 3 |
| Nanos Research | September 20, 2015 | 31.0 | 29.1 | 29.4 | 3.8 | 5.5 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 1.6 | |
| Nanos Research | September 19, 2015 | 30.8 | 29.1 | 30.3 | 3.7 | 5.1 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 0.5 | |
| Forum Research | September 18, 2015 | 33 | 29 | 29 | 4 | 4 | ±3 pp | 922 | IVR | 4 | |
| Nanos Research | September 18, 2015 | 30.4 | 28.9 | 30.8 | 3.0 | 6.0 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 0.4 | |
| Nanos Research | September 17, 2015 | 29.1 | 31.3 | 31.0 | 2.3 | 5.8 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 0.3 | |
| Nanos Research | September 16, 2015 | 30.1 | 30.4 | 30.9 | 2.5 | 5.8 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 0.5 | |
| Forum Research | September 15, 2015 | 32 | 30 | 28 | 4 | 6 | ±3 pp | 1,402 | IVR | 2 | |
| Nanos Research | September 15, 2015 | 29.0 | 31.6 | 30.1 | 2.8 | 5.3 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 1.5 | |
| Environics | September 15, 2015 | HTML | 26 | 34 | 29 | 4 | 8 | ±3.6 pp | 1,001 | telephone | 5 |
| EKOS | September 15, 2015 | 29.6 | 29.9 | 27.4 | 3.7 | 7.6 | ±1.9 pp | 2,704 | IVR | 0.3 | |
| Nanos Research | September 14, 2015 | 31.0 | 30.4 | 29.6 | 2.9 | 4.8 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 0.6 | |
| Ipsos Reid | September 13, 2015 | HTML | 29 | 32 | 31 | 4 | 4 | ±3.6 pp | 980 | online | 1 |
| Nanos Research | September 13, 2015 | 30.2 | 31.3 | 30.3 | 2.6 | 4.3 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 1.0 | |
| Nanos Research | September 12, 2015 | 31.7 | 30.8 | 30.5 | 2.5 | 4.1 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 0.9 | |
| Abacus Data | September 11, 2015 | 29 | 31 | 29 | 4 | 6 | ±2.6 pp | 1,500 | online | 2 | |
| Nanos Research | September 11, 2015 | 30.9 | 30.1 | 31.7 | 2.8 | 4.0 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 0.8 | |
| Forum Research | September 10, 2015 | 28 | 36 | 29 | 3 | 3 | ±3 pp | 1,308 | IVR | 7 | |
| Nanos Research | September 10, 2015 | 30.8 | 29.9 | 30.9 | 3.2 | 4.6 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 0.1 | |
| Innovative Research | September 10, 2015 | 28 | 31 | 30 | 4 | 6 | ±2.2 pp | 2,121 | online | 1 | |
| Nanos Research | September 9, 2015 | 28.6 | 30.6 | 32.1 | 3.6 | 4.8 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 1.5 | |
| Nanos Research | September 8, 2015 | 25.9 | 31.2 | 32.5 | 3.7 | 6.1 | ±2.8 pp | 1,200 | telephone – rolling (1/3) | 1.3 | |
| Ipsos Reid | September 8, 2015 | HTML | 29 | 34 | 30 | 3 | 3 | ±3.6 pp | 949 | online | 4 |
| EKOS | September 8, 2015 | 31.8 | 29.6 | 26.9 | 4.6 | 5.9 | ±1.9 pp | 2,677 | IVR | 2.2 | |
| Nanos Research | September 6, 2015 | 26.2 | 32.7 | 30.8 | 3.7 | 6.0 | ±2.8 pp | 1,200 | telephone – rolling | 1.9 | |
| Léger Marketing | September 2, 2015 | 28 | 31 | 30 | 4 | 5 | ±2.1 pp | 2,119 | online | 1 | |
| Forum Research | September 1, 2015 | 24 | 36 | 32 | 4 | 4 | ±3 pp | 1,384 | IVR | 4 | |
| EKOS | September 1, 2015 | 29.5 | 30.2 | 27.7 | 4.2 | 6.4 | ±1.7 pp | 3,243 | IVR | 0.7 | |
| Abacus Data | August 28, 2015 | 30 | 31 | 28 | 3 | 7 | ±2.6 pp | 1,500 | online | 1 | |
| Nanos Research | August 28, 2015 | 28.8 | 30.8 | 29.7 | 4.2 | 5.4 | ±3.1 pp | 1,000 | telephone – rolling (1/4) | 1.1 | |
| Innovative Research | August 26, 2015 | 30 | 32 | 27 | 4 | 6 | ±1.7 pp | 3,274 | online | 2 | |
| Ipsos Reid | August 26, 2015 | HTML | 29 | 33 | 30 | 4 | 4 | ±3.5 pp | 1,000 | online | 3 |
| EKOS | August 25, 2015 | 28.1 | 33.6 | 26.7 | 4.1 | 5.8 | ±1.7 pp | 3,524 | IVR | 5.5 | |
| Forum Research | August 24, 2015 | 23 | 40 | 30 | 3 | 3 | ±3 pp | 1,440 | IVR | 10 | |
| Angus Reid[LV] | August 24, 2015 | 32 | 36 | 23 | 4 | 4 | ±1.2 pp | 6,226 | online | 4 | |
| Nanos Research | August 21, 2015 | 30.1 | 29.1 | 29.9 | 4.7 | 5.2 | ±3.1 pp | 1,000 | telephone – rolling (1/4) | 0.2 | |
| Forum Research | August 19, 2015 | 29 | 34 | 28 | 4 | 4 | ±3 pp | 1,473 | IVR | 5 | |
| Abacus Data | August 17, 2015 | 29 | 35 | 26 | 3 | 6 | ±2.6 pp | 1,439 | online | 6 | |
| Nanos Research | August 14, 2015 | 31.8 | 29.0 | 28.7 | 4.5 | 5.3 | ±3.1 pp | 1,000 | telephone – rolling (1/4) | 2.8 | |
| Léger Marketing | August 12, 2015 | 27 | 33 | 28 | 5 | 6 | ±2.1 pp | 2,095 | online | 5 | |
| Mainstreet Research | August 11, 2015 | HTML | 31 | 30 | 29 | 4 | 6 | ±1.35 pp | 5,401 | IVR | 1 |
| Forum Research | August 11, 2015 | 28 | 34 | 27 | 6 | 4 | ±3 pp | 1,392 | IVR | 6 | |
| EKOS | August 11, 2015 | 30.4 | 31.8 | 24.2 | 4.2 | 7.3 | ±1.8 pp | 3,055 | IVR | 1.4 | |
| Ipsos Reid | August 10, 2015 | HTML | 30.8 | 33.0 | 27.8 | 3.9 | 4.0 | ±2.38 pp | 2,022 | telephone/online | 2.2 |
| Nanos Research | August 7, 2015 | 31.2 | 30.4 | 28.6 | 4.2 | 5.0 | ±3.1 pp | 1,000 | telephone – rolling (1/4) | 0.8 | |
| Forum Research | August 2, 2015 | 28 | 39 | 25 | 5 | 3 | ±3 pp | 1,399 | IVR | 11 | |
Notes
- 1 In cases when linked poll details distinguish between the margin of error associated with the total sample of respondents (including undecided and non-voters) and that of the subsample of decided/leaning voters, the latter is included in the table. Also not included is the margin of error created by rounding to the nearest whole number or any margin of error from methodological sources. Most online polls—because of their opt-in method of recruiting panellists which results in a non-random sample—cannot have a margin of error. In such cases, shown is what the margin of error would be for a survey using a random probability-based sample of equivalent size.
- 2 Refers to the total sample size, including undecided and non-voters.
- 3 "Telephone" refers to traditional telephone polls conducted by live interviewers; "IVR" refers to automated Interactive Voice Response polls conducted by telephone; "online" refers to polls conducted exclusively over the internet; "telephone/online" refers to polls which combine results from both telephone and online surveys, or for which respondents are initially recruited by telephone and then asked to complete an online survey. "Rolling" polls contain overlapping data from one poll to the next, with the fraction in parentheses indicating the proportion of independent data compared to the previous published poll in the series.
- LV Identifies polling firms that explicitly apply a "likely voter" turnout adjustment to their top-line results.
Pre-campaign period
Graphical summary
Evolution of voting intentions according to polls conducted during the pre-campaign period of the 2015 Canadian federal election, graphed from the data in the table below. Trendlines are local regressions, with polls weighted by proximity in time and a logarithmic function of sample size. 95% confidence ribbons represent uncertainty about the trendlines, not the likelihood that actual election results would fall within the intervals.
| Polling firm | Last date of polling |
Link | Cons. | NDP | Liberal | BQ | Green | Margin of error[1] |
Sample size[2] |
Polling method[3] | Lead |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nanos Research | July 31, 2015 | 31.5 | 30.1 | 29.3 | 3.3 | 5.4 | ±3.1 pp | 1,000 | telephone – rolling (1/2) | 1.4 | |
| Innovative Research | July 30, 2015 | HTML | 29.3 | 33.7 | 25.8 | 4.6 | 5.6 | ±1.9 pp | 2,833 | online | 4.4 |
| Forum Research | July 28, 2015 | 33 | 33 | 25 | 4 | 4 | ±3.0 pp | 1,397 | IVR | Tie | |
| EKOS | July 28, 2015 | 30.1 | 33.8 | 23.4 | 4.7 | 6.1 | ±2.1 pp | 2,247 | IVR | 3.7 | |
| Ipsos Reid | July 27, 2015 | HTML | 33 | 34 | 25 | 5 | 3 | ±2.5 pp | 1,571 | online | 1 |
| Mainstreet Research | July 21, 2015 | HTML | 38 | 27 | 25 | 4 | 6 | ±1.37 pp | 5,147 | IVR | 11 |
| Forum Research | July 20, 2015 | 28 | 34 | 29 | 5 | 4 | ±3.0 pp | 1,208 | IVR | 6 | |
| Nanos Research | July 17, 2015 | 31 | 31 | 27 | 5 | 6 | ±3.1 pp | 1,000 | telephone – rolling | Tie | |
| Leger Marketing | July 16, 2015 | 32 | 32 | 25 | 5 | 6 | ±2.5 pp | 1,545 | online | Tie | |
| EKOS | July 14, 2015 | 29.4 | 32.6 | 24.0 | 5.3 | 6.6 | ±2.0 pp | 2,538 | IVR | 3.2 | |
| Forum Research | July 13, 2015 | 27 | 34 | 27 | 7 | 5 | ±3.0 pp | 1,251 | IVR | 7 | |
| Forum Research | July 7, 2015 | 32 | 32 | 26 | 5 | 3 | ±3.0 pp | 1,200 | IVR | Tie | |
| Abacus Data | July 6, 2015 | 29 | 32 | 27 | 6 | 6 | ±2.2 pp | 2,000 | online | 3 | |
| Forum Research | June 29, 2015 | 27 | 32 | 29 | 6 | 4 | ±3.0 pp | 1,221 | IVR | 3 | |
| EKOS | June 28, 2015 | 27.3 | 30.9 | 25.6 | 6.3 | 6.6 | ±2.3 pp | 1,752 | IVR | 3.6 | |
| Forum Research | June 23, 2015 | 28 | 36 | 28 | 5 | 2 | ±3.0 pp | 1,268 | IVR | 8 | |
| Ipsos Reid | June 23, 2015 | HTML | 28 | 35 | 29 | 6 | 2 | ±2.5 pp | 2,003 | online | 6 |
| Environics | June 18, 2015 | HTML | 28 | 30 | 28 | 6 | 7 | ±2.4 pp | 2,003 | telephone | 2 |
| Forum Research | June 16, 2015 | 26 | 34 | 28 | 7 | 5 | ±3.0 pp | 1,281 | IVR | 6 | |
| EKOS | June 16, 2015 | 29.4 | 30.2 | 25.0 | 5.9 | 7.1 | ±1.6 pp | 3,834 | IVR | 0.8 | |
| EKOS | June 9, 2015 | 26.9 | 33.6 | 23.3 | 5.1 | 7.3 | ±2.0 pp | 2,491 | IVR | 6.7 | |
| Angus Reid | June 7, 2015 | 31 | 36 | 23 | 5 | 5 | ±1.2 pp | 6,005 | online | 5 | |
| Forum Research | June 5, 2015 | 31 | 28 | 32 | 3 | 5 | ±3.0 pp | 1,156 | IVR | 1 | |
| EKOS | June 2, 2015 | 29.2 | 31.3 | 23.9 | 4.8 | 7.4 | ±2.1 pp | 2,204 | IVR | 2.1 | |
| Abacus Data | May 31, 2015 | 31 | 28 | 28 | 4 | 7 | ±2.6 pp | 1,500 | online | 3 | |
| Ipsos Reid | May 29, 2015 | HTML | 31 | 30 | 31 | 4 | 4 | ±3.5 pp | 1,003 | online | Tie |
| Nanos Research | May 29, 2015 | 32 | 30 | 29 | 4 | 5 | ±3.1 pp | 1,000 | telephone – rolling (1/2) | 2 | |
| EKOS | May 26, 2015 | 29.5 | 28.9 | 26.8 | 4.1 | 7.8 | ±1.8 pp | 2,934 | IVR | 0.6 | |
| EKOS | May 19, 2015 | 28.1 | 29.6 | 26.1 | 5.4 | 7.6 | ±1.9 pp | 2,675 | IVR | 1.5 | |
| Nanos Research | May 14, 2015 | 32.9 | 25.2 | 31.3 | 3.6 | 5.3 | ±3.1 pp | 1,000 | telephone – rolling | 1.6 | |
| Forum Research | May 13, 2015 | 31 | 30 | 31 | 3 | 4 | ±3.0 pp | 1,286 | IVR | Tie | |
| EKOS | May 12, 2015 | 30.0 | 29.1 | 27.0 | 4.1 | 8.0 | ±2.1 pp | 2,177 | IVR | 0.9 | |
| EKOS | May 5, 2015 | 30.3 | 24.2 | 29.6 | 4.2 | 7.3 | ±1.8 pp | 3,017 | IVR | 0.7 | |
| Leger Marketing | April 30, 2015 | 33 | 21 | 34 | 4 | 7 | ±2.5 pp | 1,488 | online | 1 | |
| EKOS | April 28, 2015 | 32.4 | 21.9 | 28.7 | 4.1 | 9.9 | ±1.6 pp | 3,757 | IVR | 3.7 | |
| Abacus Data | April 24, 2015 | 36 | 24 | 28 | 5 | 6 | ±2.6 pp | 1,500 | online | 8 | |
| Forum Research | April 22, 2015 | 35 | 23 | 31 | 5 | 6 | ±3.0 pp | 977 | IVR | 4 | |
| EKOS | April 21, 2015 | 31.8 | 23.5 | 27.6 | 4.9 | 7.5 | ±1.6 pp | 3,850 | IVR | 4.0 | |
| Nanos Research | April 17, 2015 | 29 | 25 | 34 | 4 | 8 | ±3.1 pp | 1,000 | telephone – rolling | 5 | |
| Forum Research | April 16, 2015 | 33 | 22 | 35 | 3 | 6 | ±3.0 pp | 1,365 | IVR | 2 | |
| EKOS | April 14, 2015 | 32.2 | 22.7 | 28.5 | 4.9 | 8.0 | ±1.7 pp | 3,399 | IVR | 3.7 | |
| Ipsos Reid | April 7, 2015 | HTML | 35 | 25 | 33 | 4 | 3 | ±3.5 pp | 1,001 | online | 2 |
| EKOS | April 7, 2015 | 28.7 | 22.9 | 30.1 | 4.2 | 9.2 | ±1.7 pp | 3,306 | IVR | 1.4 | |
| Forum Research | March 31, 2015 | 31 | 23 | 34 | 5 | 5 | ±3.0 pp | 1,239 | IVR | 3 | |
| EKOS | March 31, 2015 | 31.9 | 22.6 | 27.6 | 5.2 | 9.6 | ±1.6 pp | 3,901 | IVR | 4.3 | |
| Oraclepoll Research | March 30, 2015 | 35.3 | 18.7 | 31.4 | 5.9 | 8.7 | ±1.8 pp | 3,040 | telephone | 3.9 | |
| EKOS | March 24, 2015 | 31.8 | 23.2 | 28.5 | 4.7 | 8.7 | ±1.5 pp | 4,311 | IVR | 3.3 | |
| Abacus Data | March 22, 2015 | 32 | 23 | 33 | 4 | 6 | ±3.1 pp | 1,000 | online | 1 | |
| Leger Marketing | March 18, 2015 | 34 | 20 | 35 | 4 | 6 | ±2.5 pp | 1,511 | online | 1 | |
| EKOS | March 17, 2015 | 30.2 | 21.2 | 32.1 | 4.8 | 7.9 | ±1.6 pp | 3,832 | IVR | 1.9 | |
| Forum Research | March 14, 2015 | 32 | 21 | 36 | 4 | 6 | ±3.0 pp | 1,370 | IVR | 4 | |
| EKOS | March 10, 2015 | 32.9 | 19.7 | 30.5 | 4.8 | 8.8 | ±1.8 pp | 2,950 | IVR | 2.4 | |
| EKOS | March 3, 2015 | 32.2 | 19.9 | 31.3 | 4.6 | 9.0 | ±1.7 pp | 3,241 | IVR | 0.9 | |
| Nanos Research | February 27, 2015 | 33 | 23 | 34 | 5 | 5 | ±3.1 pp | 1,000 | telephone – rolling | 1 | |
| EKOS | February 24, 2015 | 31.1 | 22.1 | 31.9 | 4.5 | 7.5 | ±1.6 pp | 3,607 | IVR | 0.8 | |
| Ipsos Reid | February 23, 2015 | HTML | 33 | 23 | 34 | 6 | 3 | ±2.2 pp | 2,650 | online | 1 |
| EKOS | February 17, 2015 | 32.3 | 19.1 | 31.6 | 5.4 | 8.0 | ±1.7 pp | 3,386 | IVR | 0.7 | |
| Abacus Data | February 16, 2015 | 35 | 21 | 34 | 4 | 4 | ±2.6 pp | 1,460 | online | 1 | |
| Forum Research | February 10, 2015 | 32 | 17 | 39 | 4 | 5 | ±3.0 pp | 1,018 | IVR | 7 | |
| EKOS | February 10, 2015 | 32.0 | 18.9 | 33.8 | 4.2 | 8.5 | ±1.8 pp | 3,005 | IVR | 1.8 | |
| EKOS | February 3, 2015 | 35.0 | 17.9 | 32.2 | 3.8 | 8.0 | ±1.8 pp | 2,974 | IVR | 2.8 | |
| Leger Marketing | February 2, 2015 | 32 | 20 | 35 | 5 | 6 | ±2.5 pp | 1,507 | online | 3 | |
| Forum Research | January 28, 2015 | 35 | 20 | 34 | 5 | 6 | ±3.0 pp | 1,382 | IVR | 1 | |
| Abacus Data | January 28, 2015 | 33 | 24 | 32 | 4 | 5 | ±3.1 pp | 1,005 | online | 1 | |
| EKOS | January 13, 2015 | 31.0 | 19.1 | 33.1 | 4.4 | 8.9 | ±1.5 pp | 4,412 | IVR | 2.1 | |
| Ipsos Reid | January 11, 2015 | HTML | 35 | 24 | 31 | 6 | 4 | ±2.6 pp | 1,915 | online | 4 |
| Forum Research | January 6, 2015 | 33 | 20 | 37 | 4 | 5 | ±2.0 pp | 1,741 | IVR | 4 | |
| Abacus Data | December 20, 2014 | 34 | 22 | 33 | 4 | 6 | ±2.6 pp | 1,438 | online | 1 | |
| EKOS | December 18, 2014 | 29.8 | 20.2 | 33.8 | 5.3 | 7.7 | ±1.7 pp | 2,183 | IVR | 3.0 | |
| Angus Reid | December 13, 2014 | 34 | 22 | 34 | 4 | 5 | ±1.2 pp | 6,325 | online | Tie | |
| EKOS | December 12, 2014 | 30.8 | 20.0 | 31.8 | 5.0 | 7.8 | ±1.7 pp | 3,276 | IVR | 1 | |
| Forum Research | December 11, 2014 | 33 | 17 | 41 | 3 | 5 | ±2.0 pp | 1,658 | IVR | 8 | |
| Leger Marketing | December 11, 2014 | 32 | 19 | 38 | 4 | 6 | ±2.5 pp | 1,521 | online | 6 | |
| Ipsos Reid | December 1, 2014 | HTML | 33 | 24 | 34 | 5 | 4 | ±1.2 pp | 8,268 | online | 1 |
| Forum Research | November 20, 2014 | 33 | 18 | 36 | 4 | 8 | ±3.0 pp | 1,500 | IVR | 3 | |
| EKOS | November 6, 2014 | 30.2 | 20.5 | 33.5 | 3.5 | 9.7 | ±2.5 pp | 1,561 | IVR | 3.3 | |
| Leger Marketing | November 6, 2014 | 33 | 19 | 36 | 3 | 7 | ±2.5 pp | 1,493 | online | 3 | |
| Abacus Data | November 4, 2014 | 30 | 24 | 35 | 4 | 6 | ±2.3 pp | 1,850 | online | 5 | |
| EKOS | October 29, 2014 | 27.8 | 21.4 | 33.4 | 5.5 | 8.2 | ±2.4 pp | 1,628 | IVR | 5.6 | |
| Abacus Data | October 17, 2014 | 30 | 25 | 32 | 4 | 8 | ±2.8 pp | 1,248 | online | 2 | |
| Leger Marketing | October 16, 2014 | 32 | 21 | 37 | 4 | 5 | ±2.5 pp | 1,524 | online | 5 | |
| EKOS | October 15, 2014 | 26.4 | 25.0 | 38.5 | 3.1 | 5.7 | ±2.4 pp | 1,671 | telephone/online | 12.1 | |
| Forum Research | October 5, 2014 | 34 | 19 | 38 | 4 | 4 | ±2.5 pp | 1,504 | IVR | 4 | |
| EKOS | September 25, 2014 | 24.9 | 24.4 | 38.3 | 4.0 | 7.7 | ±2.5 pp | 1,549 | telephone/online | 13.4 | |
| Angus Reid | September 19, 2014 | 30 | 22 | 36 | 4 | 6 | ±2.5 pp | 1,502 | online | 6 | |
| Abacus Data | September 14, 2014 | 30 | 23 | 38 | 3 | 5 | ±3.1 pp | 1,075 | online | 8 | |
| Ipsos Reid | September 12, 2014 | HTML | 31 | 23 | 38 | 5 | 3 | ±2.8 pp | 1,605 | online | 7 |
| Forum Research | September 5, 2014 | 34 | 18 | 40 | 4 | 3 | ±3.0 pp | 1,267 | IVR | 6 | |
| Forum Research | August 19, 2014 | 32 | 17 | 41 | 5 | 5 | ±2.0 pp | 1,798 | IVR | 9 | |
| Abacus Data | August 18, 2014 | 29 | 22 | 35 | 5 | 7 | ±2.5 pp | 1,614 | online | 6 | |
| Ipsos Reid | August 17, 2014 | HTML | 31 | 24 | 38 | 3 | 3 | ±3.5 pp | 1,012 | online | 7 |
| EKOS | July 23, 2014 | 25.6 | 23.4 | 38.7 | 3.7 | 7.1 | ±1.9 pp | 2,620 | telephone/online | 12.1 | |
| Forum Research | July 18, 2014 | 28 | 18 | 44 | 5 | 3 | ±2.0 pp | 1,624 | IVR | 16 | |
| Abacus Data | July 3, 2014 | 31 | 23 | 34 | 5 | 6 | ±2.2 pp | 2,000 | online | 3 | |
| Forum Research | June 17, 2014 | 31 | 19 | 39 | 4 | 5 | ±2.0 pp | 1,683 | IVR | 8 | |
| Angus Reid | June 12, 2014 | 31 | 27 | 30 | 5 | 6 | ±1.2 pp | 6,264 | online | 1 | |
| Angus Reid | May 23, 2014 | 31 | 25 | 30 | 5 | 7 | ±3.4 pp | 1,503 | online | 1 | |
| Forum Research | May 23, 2014 | 30 | 23 | 36 | 6 | 5 | ±2.0 pp | 1,694 | IVR | 6 | |
| EKOS | May 1, 2014 | 27.6 | 21.4 | 34.9 | 5.3 | 8.2 | ±1.6 pp | 3,677 | IVR | 7.3 | |
| Forum Research | April 29, 2014 | 30 | 20 | 39 | 6 | 4 | ±2.0 pp | 1,572 | IVR | 9 | |
| Ipsos Reid | April 22, 2014 | HTML | 33 | 24 | 33 | 6 | 4 | ±3.5 pp | 1,014 | online | Tie |
| Angus Reid | April 15, 2014 | 32 | 26 | 30 | 5 | 6 | ±3.4 pp | 1,505 | online | 2 | |
| EKOS | April 3, 2014 | 26.7 | 21.8 | 35.8 | 4.8 | 8.1 | ±1.5 pp | 4,134 | IVR | 9.1 | |
| Forum Research | March 28, 2014 | 29 | 22 | 39 | 5 | 3 | ±2.0 pp | 1,764 | IVR | 10 | |
| Angus Reid | March 9, 2014 | 28 | 27 | 33 | 5 | 6 | ±1.2 pp | 6,445 | online | 5 | |
| Abacus Data | March 5, 2014 | 28 | 23 | 34 | 8 | 6 | ±2.8 pp | 1,249 | online | 6 | |
| Forum Research | February 19, 2014 | 29 | 21 | 39 | 6 | 4 | ±2.0 pp | 1,824 | IVR | 10 | |
| Ipsos Reid | February 18, 2014 | HTML | 29 | 24 | 37 | 5 | 5 | ±3.5 pp | 1,034 | online | 8 |
| Angus Reid | February 16, 2014 | 28 | 26 | 33 | 5 | 6 | ±2.5 pp | 1,514 | online | 5 | |
| Nanos Research | February 15, 2014 | 28.7 | 23.2 | 34.0 | 6.4 | 5.3 | ±3.4 pp | 1,000 | telephone | 5.3 | |
| Ipsos Reid | February 4, 2014 | HTML | 29 | 27 | 33 | 7 | 4 | ±3.5 pp | 1,001 | online | 4 |
| EKOS | January 27, 2014 | 29.7 | 24.3 | 33.2 | 4.5 | 6.2 | ±2.5 pp | 1,501 | telephone/online | 3.5 | |
| Forum Research | January 25, 2014 | 28 | 24 | 38 | 5 | 4 | ±3.0 pp | 1,228 | IVR | 10 | |
| Abacus Data | January 18, 2014 | 28 | 24 | 34 | 5 | 7 | ±2.2 pp | 1,996 | online | 6 | |
| Forum Research | January 17, 2014 | 28 | 25 | 37 | 5 | 4 | ±2.0 pp | 1,779 | IVR | 9 | |
| EKOS | December 15, 2013 | 26.2 | 22.9 | 32.1 | 6.3 | 9.3 | ±1.7 pp | 3,468 | IVR | 5.9 | |
| Forum Research | December 13, 2013 | 32 | 21 | 38 | 5 | 3 | ±2.0 pp | 1,634 | IVR | 6 | |
| Ipsos Reid | November 27, 2013 | HTML | 29 | 26 | 35 | 6 | 3 | ±3.5 pp | 1,014 | online | 6 |
| Harris-Decima | November 25, 2013 | 26 | 23 | 36 | 7 | 7 | ±2.2 pp | 2,034 | telephone | 10 | |
| Forum Research | November 13, 2013 | 29 | 22 | 38 | 6 | 4 | ±2.0 pp | 1,834 | IVR | 9 | |
| EKOS | October 29, 2013 | 26.4 | 24.9 | 37.4 | 5.2 | 5.2 | ±2.6 pp | 1,377 | telephone/online | 11.0 | |
| Ipsos Reid | October 28, 2013 | HTML | 30 | 31 | 31 | 6 | 2 | ±3.4 pp | 1,102 | online | Tie |
| Forum Research | October 23, 2013 | 28 | 20 | 40 | 6 | 5 | ±3.0 pp | 1,007 | IVR | 12 | |
| Forum Research | October 22, 2013 | 30 | 19 | 39 | 7 | 5 | ±2.0 pp | 1,859 | IVR | 9 | |
| Abacus Data | October 22, 2013 | 32 | 23 | 32 | 5 | 7 | ±2.6 pp | 1,459 | online | Tie | |
| Ipsos Reid | October 20, 2013 | HTML | 31 | 27 | 33 | 6 | 2 | ±3.4 pp | 1,042 | online | 2 |
| Nanos Research | October 18, 2013 | 29 | 23 | 37 | 5 | 5 | ±3.5 pp | 1,000 | telephone | 8 | |
| EKOS | October 14, 2013 | 26.1 | 24.9 | 36.3 | 5.0 | 6.5 | ±2.5 pp | 1,554 | telephone/online | 10.2 | |
| Ipsos Reid | September 20, 2013 | HTML | 32 | 26 | 31 | 7 | 3 | ±3.5 pp | 1,035 | online | 1 |
| Forum Research | September 17, 2013 | 31 | 21 | 36 | 7 | 4 | ±3.0 pp | 1,527 | IVR | 5 | |
| Harris-Decima | September 9, 2013 | 29 | 24 | 33 | 6 | 6 | ±2.2 pp | 2,020 | telephone | 4 | |
| Abacus Data | September 4, 2013 | 30 | 27 | 29 | 8 | 4 | ±2.5 pp | 1,600 | online | 1 | |
| Nanos Research | August 31, 2013 | 30 | 25 | 33 | 5 | 5 | ±3.5 pp | 1,000 | telephone | 3 | |
| Forum Research | August 23, 2013 | 29 | 22 | 38 | 6 | 4 | ±3.0 pp | 1,189 | IVR | 9 | |
| Nanos Research | August 22, 2013 | 29.7 | 24.8 | 35.7 | 3.9 | 5.5 | ±3.3 pp | 1,000 | telephone/online | 6.0 | |
| Nanos Research | August 19, 2013 | 31.9 | 22.8 | 35.3 | 2.5 | 5.9 | ±2.2 pp | 2,000 | telephone | 3.4 | |
| Forum Research | July 23, 2013 | 31 | 22 | 35 | 7 | 4 | ±2.0 pp | 1,782 | IVR | 4 | |
| EKOS | July 9, 2013 | 28.4 | 23.4 | 30.4 | 6.3 | 8.5 | ±1.8 pp | 2,900 | IVR | 2.0 | |
| Environics | June 30, 2013 | 28 | 24 | 34 | 6 | 6 | ±2.4 pp | 2,149 | telephone | 6 | |
| Ipsos Reid | June 25, 2013 | HTML | 30 | 28 | 33 | 6 | 4 | ±3.3 pp | 1,177 | online | 3 |
| Abacus Data | June 23, 2013 | HTML | 27 | 26 | 29 | 6 | 10 | ±3.1 pp | 999 | online | 2 |
| Leger Marketing | June 19, 2013 | 29 | 21 | 37 | 4 | 8 | ±2.5 pp | 1,503 | online | 8 | |
| Nanos Research | June 19, 2013 | 29.4 | 25.3 | 34.2 | 3.7 | 6.4 | ±3.5 pp | 1,000 | telephone/online | 4.8 | |
| Forum Research | June 18, 2013 | 30 | 20 | 38 | 6 | 4 | ±2.0 pp | 1,525 | IVR | 8 | |
| Ipsos Reid | May 28, 2013 | HTML | 30 | 27 | 36 | 4 | 4 | ±3.5 pp | 1,009 | online | 6 |
| EKOS | May 26, 2013 | HTML | 26.3 | 20.9 | 34.7 | 5.4 | 9.2 | ±1.7 pp | 3,318 | IVR | 8.4 |
| Forum Research | May 22, 2013 | 27 | 20 | 44 | 4 | 3 | ±2.0 pp | 1,779 | IVR | 17 | |
| EKOS | May 2, 2013 | 26.2 | 23.9 | 38.6 | 4.2 | 6.3 | ±2.7 pp | 1,309 | telephone/online | 12.4 | |
| Ipsos Reid | April 30, 2013 | HTML | 32 | 25 | 35 | 5 | 3 | ±3.4 pp | 1,059 | online | 3 |
| Harris-Decima | April 28, 2013 | 28 | 22 | 35 | 6 | 7 | ±2.2 pp | 2,008 | telephone | 7 | |
| Forum Research | April 15, 2013 | 30 | 19 | 43 | 5 | 2 | ±2.0 pp | 1,764 | IVR | 13 | |
| EKOS | April 10, 2013 | 28.8 | 23.3 | 29.1 | 6.4 | 9.0 | ±1.5 pp | 4,568 | IVR | 0.3 | |
| Nanos Research | April 8, 2013 | 31.3 | 23.6 | 35.4 | 4.8 | 4.2 | ±3.3 pp | 1,002 | telephone/online | 4.1 | |
| Abacus Data | April 6, 2013 | 33 | 27 | 27 | 5 | 7 | ±2.6 pp | 1,511 | online | 6 | |
| Ipsos Reid | April 3, 2013 | HTML | 31 | 27 | 32 | 6 | 4 | ±3.4 pp | 1,053 | 1 | |
| Forum Research | April 2, 2013 | 29 | 25 | 33 | 5 | 6 | ±3.0 pp | 1,310 | IVR | 4 | |
| Leger Marketing | March 28, 2013 | 31 | 24 | 30 | 7 | 7 | ±2.5 pp | 1,511 | online | 1 | |
| Abacus Data | March 21, 2013 | 32 | 31 | 24 | 5 | 8 | ±3.1 pp | 1,014 | online | 1 | |
| Forum Research | March 7, 2013 | 31 | 27 | 30 | 6 | 5 | ±2.0 pp | 1,755 | IVR | 1 | |
| Nanos Research | February 24, 2013 | 31.5 | 27.2 | 29.1 | 5.2 | 5.9 | ±3.7 pp | 1,000 | telephone | 2.4 | |
| EKOS | February 10, 2013 | 29.3 | 26.3 | 24.6 | 7.2 | 9.5 | ±1.3 pp | 5,947 | IVR | 3.0 | |
| Forum Research | February 6, 2013 | 32 | 26 | 30 | 6 | 4 | ±3.0 pp | 1,091 | IVR | 2 | |
| Abacus Data | February 6, 2013 | 35 | 31 | 21 | 6 | 6 | ±2.3 pp | 1,832 | online | 4 | |
| Nanos Research | January 31, 2013 | 34.3 | 27.1 | 27.6 | 4.6 | 4.7 | ±3.5 pp | 1,000 | telephone | 6.7 | |
| Forum Research | January 17, 2013 | 36 | 28 | 25 | 7 | 4 | ±2.0 pp | 1,626 | IVR | 8 | |
| Angus Reid | January 17, 2013 | 35 | 29 | 22 | 6 | 6 | ±2.2 pp | 2,028 | online | 6 | |
| Angus Reid | January 3, 2013 | 35 | 33 | 19 | 6 | 6 | ±3.1 pp | 1,012 | online | 2 | |
| Forum Research | December 18, 2012 | 31 | 28 | 27 | 6 | 6 | ±2.0 pp | 1,355 | IVR | 3 | |
| Abacus Data | December 8, 2012 | 34 | 32 | 22 | 6 | 6 | ±2.6 pp | 1,505 | online | 2 | |
| Leger Marketing | December 6, 2012 | 35 | 30 | 18 | 7 | 9 | ±2.5 pp | 1,500 | online | 5 | |
| EKOS | December 3, 2012 | 31.9 | 25.8 | 24.4 | 6.7 | 8.4 | ±1.3 pp | 5,433 | IVR | 6.1 | |
| Forum Research | November 19, 2012 | 33 | 28 | 28 | 6 | 4 | ±2.0 pp | 1,849 | IVR | 5 | |
| Nanos Research | November 15, 2012 | 33.8 | 27.2 | 29.0 | 4.9 | 3.7 | ±3.5 pp | 1,004 | telephone | 4.8 | |
| Abacus Data | November 11, 2012 | 36 | 29 | 22 | 7 | 6 | ±3.0 pp | 1,068 | online | 7 | |
| Ipsos Reid | November 8, 2012 | HTML | 34 | 30 | 26 | 7 | 2 | ±2.5 pp | 2,009 | telephone/online | 4 |
| Forum Research | October 27, 2012 | 31 | 32 | 27 | 6 | 4 | ±2.0 pp | 1,735 | IVR | 1 | |
| Nanos Research | October 11, 2012 | 33.3 | 27.9 | 30.1 | 4.7 | 2.9 | ±3.4 pp | 1,000 | telephone | 3.2 | |
| Forum Research | September 26, 2012 | 35 | 30 | 25 | 6 | 3 | ±2.0 pp | 1,707 | IVR | 5 | |
| Environics | September 23, 2012 | 31 | 35 | 20 | 9 | 5 | ±2.4 pp | 2,000 | telephone | 4 | |
| Abacus Data | September 18, 2012 | 35 | 35 | 17 | 7 | 6 | ±2.9 pp | 1,208 | online | Tie | |
| Harris-Decima | September 10, 2012 | HTML | 34 | 27 | 24 | 6 | 7 | ±2.2 pp | 2,007 | telephone | 7 |
| Nanos Research | September 9, 2012 | 32.4 | 30.4 | 24.6 | 5.8 | 5.0 | ±3.4 pp | 1,000 | telephone | 2.0 | |
| Forum Research | August 22, 2012 | 34 | 34 | 22 | 6 | 4 | ±2.4 pp | 1,720 | IVR | Tie | |
| Abacus Data | August 12, 2012 | HTML | 37 | 32 | 20 | 6 | 6 | ±2.2 pp | 2,099 | online | 5 |
| Forum Research | July 26, 2012 | 31 | 35 | 22 | 6 | 5 | ±2.4 pp | 1,639 | IVR | 4 | |
| Nanos Research | July 12, 2012 | 33.6 | 30.3 | 26.5 | 4.4 | 4.2 | ±3.2 pp | 1,200 | telephone | 3.3 | |
| EKOS | July 5, 2012 | 30.2 | 32.3 | 19.5 | 4.9 | 10.0 | ±2.1 pp | 2,098 | IVR | 2.1 | |
| Forum Research | June 27, 2012 | 35 | 35 | 19 | 6 | 3 | ±2.9 pp | 1,165 | IVR | Tie | |
| EKOS | June 26, 2012 | 29.3 | 32.4 | 19.2 | 6.5 | 9.5 | ±2.2 pp | 2,049 | IVR | 3.1 | |
| Abacus Data | June 23, 2012 | HTML | 35 | 35 | 20 | 5 | 6 | ±3.1 pp | 1,008 | online | Tie |
| Environics | June 23, 2012 | 33 | 35 | 19 | 7 | 5 | ±2.4 pp | 2,093 | telephone | 2 | |
| Ipsos Reid | June 21, 2012 | HTML | 35 | 38 | 18 | 6 | 4 | ±3.1 pp | 1,099 | online | 3 |
| Harris-Decima | June 18, 2012 | 31 | 32 | 23 | 5 | 7 | ±2.2 pp | 2,000 | telephone | 1 | |
| Angus Reid | June 16, 2012 | 34 | 35 | 19 | 6 | 5 | ±2.5 pp | 1,500 | online | 1 | |
| Forum Research | June 14, 2012 | 30 | 37 | 22 | 6 | 5 | ±2.5 pp | 1,529 | IVR | 7 | |
| Nanos Research | May 31, 2012 | 33.5 | 33.6 | 24.9 | 3.4 | 2.4 | ±3.1 pp | 1,201 | telephone | 0.1 | |
| Forum Research | May 23, 2012 | 32 | 36 | 20 | 5 | 6 | ±2.3 pp | 1,836 | IVR | 4 | |
| Angus Reid | May 23, 2012 | 37 | 33 | 18 | 7 | 4 | ±3.1 pp | 1,014 | online | 4 | |
| Abacus Data | May 16, 2012 | 37 | 35 | 17 | 6 | 5 | ±3.1 pp | 1,008 | online | 2 | |
| Ipsos Reid | May 10, 2012 | HTML | 37 | 35 | 19 | 5 | 3 | ±2.0 pp | 2,061 | telephone/online | 2 |
| Environics | May 9, 2012 | 32 | 36 | 19 | 6 | 7 | ±3.5 pp | 1,000 | telephone | 4 | |
| Harris-Decima | May 6, 2012 | 30 | 34 | 20 | 7 | 8 | ±2.2 pp | 2,018 | telephone | 4 | |
| Harris-Decima | April 30, 2012 | 30 | 33 | 20 | 7 | 8 | ±3.1 pp | 1,006 | telephone | 3 | |
| Forum Research | April 25, 2012 | 33 | 36 | 22 | 6 | 2 | ±2.4 pp | 1,744 | IVR | 3 | |
| Nanos Research | April 18, 2012 | 34.7 | 32.4 | 23.3 | 3.9 | 4.2 | ±3.2 pp | 1,200 | telephone | 2.3 | |
| Ipsos Reid | April 5, 2012 | HTML | 34 | 33 | 21 | 7 | 4 | ±2.0 pp | 1,008 | telephone | 1 |
| Leger Marketing | April 4, 2012 | 32 | 33 | 19 | 7 | 8 | ±2.5 pp | 1,506 | online | 1 | |
| Harris-Decima | April 2, 2012 | 34 | 32 | 19 | 6 | 8 | ±2.2 pp | 2,003 | telephone | 2 | |
| Forum Research | March 30, 2012 | 36 | 34 | 19 | 5 | 5 | ±2.4 pp | 1,675 | IVR | 2 | |
| Forum Research | March 27, 2012 | 35 | 35 | 19 | 7 | 3 | ±2.4 pp | 1,638 | IVR | Tie | |
| Angus Reid | March 21, 2012 | 37 | 29 | 21 | 8 | 4 | ±3.1 pp | 1,004 | online | 8 | |
| Innovative Research | March 21, 2012 | 37 | 25 | 24 | 6 | 7 | ±2.8 pp | 1,193 | online | 12 | |
| Harris-Decima | March 19, 2012 | 31 | 28 | 24 | 8 | 7 | ±2.2 pp | 2,005 | telephone | 3 | |
| Environics | March 18, 2012 | 30 | 30 | 20 | 8 | 7 | ±2.4 pp | 2,000 | telephone | Tie | |
| Abacus Data | March 13, 2012 | HTML | 37 | 28 | 20 | 8 | 7 | ±3.1 pp | 1,003 | online | 9 |
| EKOS | March 11, 2012 | 35.4 | 29.7 | 19.6 | 5.8 | 8.1 | ±2.2 pp | 2,011 | telephone/online | 5.7 | |
| Ipsos Reid | March 8, 2012 | HTML | 37 | 29 | 23 | 7 | 4 | ±2.0 pp | 3,154 | telephone/online | 8 |
| Leger Marketing | March 5, 2012 | 34 | 26 | 24 | 8 | 7 | ±2.0 pp | 2,509 | online | 8 | |
| Forum Research | March 3, 2012 | 37 | 28 | 25 | 5 | 4 | ±2.4 pp | 1,675 | IVR | 9 | |
| Nanos Research | February 29, 2012 | 35.7 | 25.0 | 29.5 | 4.9 | 3.4 | ±3.1 pp | 1,203 | telephone | 6.2 | |
| EKOS | February 28, 2012 | 31.5 | 29.2 | 21.7 | 6.0 | 8.3 | ±1.6 pp | 3,699 | IVR | 2.3 | |
| Forum Research | February 6, 2012 | 36 | 28 | 26 | 6 | 3 | ±2.8 pp | 1,210 | IVR | 8 | |
| Nanos Research | January 23, 2012 | 35.7 | 25.2 | 27.6 | 5.6 | 4.5 | ±3.2 pp | 1,201 | telephone | 8.1 | |
| Harris-Decima | January 22, 2012 | 32 | 29 | 25 | 5 | 7 | ±2.2 pp | 2,000 | telephone | 3 | |
| Angus Reid | January 21, 2012 | 39 | 28 | 22 | 6 | 5 | ±3.1 pp | 1,000 | online | 11 | |
| Abacus Data | January 19, 2012 | 37 | 28 | 21 | 6 | 7 | ±3.1 pp | 1,000 | online | 9 | |
| Forum Research | January 13, 2012 | 35 | 28 | 25 | 6 | 4 | ±2.8 pp | 1,211 | IVR | 7 | |
| EKOS | December 21, 2011 | 31.4 | 29.5 | 24.8 | 6.7 | 6.1 | ±2.2 pp | 2,005 | telephone/online | 1.9 | |
| Nanos Research | December 18, 2011 | 36.5 | 28.7 | 25.6 | 4.4 | 3.8 | ±3.3 pp | 1,201 | telephone | 7.8 | |
| Forum Research | December 13, 2011 | 33 | 27 | 21 | 6 | 8 | ±2.9 pp | 1,160 | IVR | 6 | |
| Harris-Decima | December 12, 2011 | 34 | 28 | 22 | 6 | 7 | ±2.2 pp | 2,005 | telephone | 6 | |
| Abacus Data | December 4, 2011 | 40 | 31 | 18 | 6 | 5 | ±3.1 pp | 1,004 | online | 9 | |
| Nanos Research | November 21, 2011 | 35.6 | 27.3 | 28.1 | 3.9 | 3.9 | ±3.2 pp | 1,202 | telephone | 7.5 | |
| Ipsos Reid | November 9, 2011 | HTML | 37 | 31 | 21 | 6 | 3 | 6 | |||
| Harris-Decima | November 6, 2011 | 36 | 29 | 22 | 5 | 7 | ±2.2 pp | 2,000 | telephone | 7 | |
| Nanos Research | October 24, 2011 | 37.7 | 30.0 | 23.4 | 3.6 | 3.8 | ±3.2 pp | 1,202 | telephone | 7.7 | |
| Nanos Research | October 2, 2011 | 39.0 | 29.0 | 24.5 | 3.5 | 2.9 | ±3.2 pp | 1,209 | telephone | 10.0 | |
| Angus Reid | September 21, 2011 | 39 | 29 | 21 | 5 | 4 | ±2.4 pp | 1,668 | online | 10 | |
| Leger Marketing | September 15, 2011 | HTML | 39 | 33 | 17 | 5 | 6 | ±2.4 pp | 1,625 | online | 6 |
| Nanos Research | September 1, 2011 | 39.5 | 33.1 | 20.7 | 2.6 | 3.4 | ±3.2 pp | 1,210 | telephone | 6.4 | |
| Harris-Decima | August 29, 2011 | 33 | 33 | 21 | 6 | 7 | ±2.2 pp | 2,026 | telephone | Tie | |
| Abacus Data | August 15, 2011 | 38 | 32 | 19 | 5 | 6 | ±3.2 pp | 1,003 | online | 6 | |
| Angus Reid | August 9, 2011 | 39 | 31 | 19 | 6 | 4 | ±3.1 pp | 1,005 | online | 8 | |
| Nanos Research | August 2, 2011 | 36.2 | 26.8 | 27.0 | 4.4 | 4.5 | ±3.1 pp | 1,203 | telephone | 9.2 | |
| Abacus Data | June 24, 2011 | 41 | 32 | 17 | 6 | 5 | ±3.2 pp | 1,005 | online | 9 | |
| Nanos Research | June 19, 2011 | 41.8 | 28.0 | 22.3 | 3.4 | 3.7 | ±3.1 pp | 1,211 | telephone | 13.8 | |
| Nanos Research | May 29, 2011 | 39.7 | 29.9 | 21.5 | 2.7 | 4.8 | ±3.1 pp | 1,205 | telephone | 9.8 | |
| Harris-Decima | May 22, 2011 | HTML | 38 | 33 | 15 | 5 | 7 | ±2.2 pp | 2,000 | telephone | 5 |
| Abacus Data | May 19, 2011 | 40 | 33 | 16 | 6 | 5 | ±2.5 pp | 1,544 | online | 7 | |
| 2011 election | May 2, 2011 | HTML | 39.6 | 30.6 | 18.9 | 6.0 | 3.9 | 9.0 |
Notes
- 1 In cases when linked poll details distinguish between the margin of error associated with the total sample of respondents (including undecided and non-voters) and that of the subsample of decided/leaning voters, the latter is included in the table. Also not included is the margin of error created by rounding to the nearest whole number or any margin of error from methodological sources. Most online polls—because of their opt-in method of recruiting panellists which results in a non-random sample—cannot have a margin of error. In such cases, shown is what the margin of error would be for a survey using a random probability-based sample of equivalent size.
- 2 Refers to the total sample size, including undecided and non-voters.
- 3 "Telephone" refers to traditional telephone polls conducted by live interviewers; "IVR" refers to automated Interactive Voice Response polls conducted by telephone; "online" refers to polls conducted exclusively over the internet; "telephone/online" refers to polls which combine results from both telephone and online surveys, or for which respondents are initially recruited by telephone and then asked to complete an online survey. "Rolling" polls contain overlapping data from one poll to the next, with the fraction in parentheses indicating the proportion of independent data compared to the previous published poll in the series.
Leadership polls
Aside from conducting the usual opinion surveys on general party preferences, polling firms also survey public opinion on who would make the best Prime Minister:
| Polling Firm | Last Date of Polling |
Link | Stephen Harper | Thomas Mulcair | Justin Trudeau | Elizabeth May | Margin of Error[1] |
|---|---|---|---|---|---|---|---|
| Nanos Research | October 17, 2015 | 30.1 | 18.9 | 35.2 | 5.3 | ±2.2 pp | |
| Nanos Research | October 16, 2015 | 30.2 | 19.0 | 35.0 | 5.3 | ±2.5 pp | |
| Nanos Research | October 15, 2015 | 30.0 | 19.3 | 34.6 | 5.6 | ±2.8 pp | |
| Nanos Research | October 14, 2015 | 29.2 | 20.1 | 33.9 | 5.8 | ±2.8 pp | |
| Nanos Research | October 13, 2015 | 28.8 | 19.9 | 33.0 | 6.4 | ±2.8 pp | |
| Ipsos Reid | October 13, 2015 | HTML | 32 | 30 | 38 | ±3.0 pp | |
| Nanos Research | October 11, 2015 | 28.1 | 20.5 | 32.3 | 6.4 | ±2.8 pp | |
| Nanos Research | October 10, 2015 | 28.2 | 22.6 | 30.2 | 5.8 | ±2.8 pp | |
| Forum Research | October 9, 2015 | 26 | 22 | 29 | 8 | ±3 pp | |
| Nanos Research | October 9, 2015 | 28.1 | 23.1 | 30.4 | 5.5 | ±2.8 pp | |
| Nanos Research | October 8, 2015 | 30.8 | 22.8 | 29.8 | 4.9 | ±2.8 pp | |
| Nanos Research | October 7, 2015 | 32.6 | 19.9 | 30.8 | 4.9 | ±2.8 pp | |
| Forum Research | October 6, 2015 | 27 | 22 | 28 | 9 | ±3 pp | |
| Nanos Research | October 6, 2015 | 33.2 | 18.7 | 30.4 | 5.8 | ±2.8 pp | |
| Nanos Research | October 5, 2015 | 31.7 | 19.0 | 30.6 | 5.1 | ±2.8 pp | |
| Nanos Research | October 4, 2015 | 31.1 | 20.7 | 30.2 | 5.4 | ±2.8 pp | |
| Nanos Research | October 3, 2015 | 31.7 | 22.7 | 29.4 | 4.6 | ±2.8 pp | |
| Nanos Research | October 2, 2015 | 32.6 | 24.4 | 27.7 | 4.8 | ±2.8 pp | |
| Nanos Research | October 1, 2015 | 33.2 | 23.2 | 28.3 | 4.4 | ±2.8 pp | |
| Léger Marketing | September 30, 2015 | HTML | 24 | 24 | 23 | ±2.1 pp | |
| Nanos Research | September 30, 2015 | 32.9 | 24.1 | 27.3 | 4.3 | ±2.8 pp | |
| Forum Research | September 29, 2015 | 29 | 25 | 22 | 9 | ±3 pp | |
| Nanos Research | September 29, 2015 | 32.0 | 23.5 | 28.0 | 4.4 | ±2.8 pp | |
| Nanos Research | September 28, 2015 | 31.4 | 24.8 | 27.4 | 4.0 | ±2.8 pp | |
| Ipsos Reid | September 28, 2015 | HTML | 35 | 34 | 32 | ±3.0 pp | |
| Nanos Research | September 27, 2015 | 32.4 | 23.7 | 25.9 | 4.5 | ±2.8 pp | |
| Nanos Research | September 26, 2015 | 31.4 | 23.0 | 27.8 | 4.6 | ±2.8 pp | |
| Nanos Research | September 25, 2015 | 30.2 | 24.4 | 27.2 | 5.5 | ±2.8 pp | |
| Nanos Research | September 24, 2015 | 29.2 | 25.6 | 29.2 | 4.9 | ±2.8 pp | |
| Forum Research | September 23, 2015 | 25 | 24 | 25 | 9 | ±3 pp | |
| Nanos Research | September 23, 2015 | 30.1 | 26.0 | 28.3 | 5.1 | ±2.8 pp | |
| Nanos Research | September 22, 2015 | 30.2 | 26.2 | 27.1 | 5.8 | ±2.8 pp | |
| Nanos Research | September 21, 2015 | 30.3 | 26.1 | 27.0 | 6.1 | ±2.8 pp | |
| Ipsos Reid | September 21, 2015 | HTML | 30 | 38 | 32 | ±3.4 pp | |
| Nanos Research | September 20, 2015 | 29.3 | 25.9 | 25.3 | 6.1 | ±2.8 pp | |
| Nanos Research | September 19, 2015 | 30.0 | 25.5 | 26.6 | 5.2 | ±2.8 pp | |
| Forum Research | September 18, 2015 | 28 | 24 | 24 | 9 | ±3 pp | |
| Nanos Research | September 18, 2015 | 29.7 | 26.3 | 25.5 | 6.0 | ±2.8 pp | |
| Nanos Research | September 17, 2015 | 30.1 | 28.6 | 25.4 | 5.8 | ±2.8 pp | |
| Nanos Research | September 16, 2015 | 31.2 | 28.1 | 24.6 | 6.2 | ±2.8 pp | |
| Forum Research | September 15, 2015 | 25 | 30 | 19 | 8 | ±3 pp | |
| Nanos Research | September 15, 2015 | 31.0 | 29.1 | 24.5 | 5.7 | ±2.8 pp | |
| Nanos Research | September 14, 2015 | 31.6 | 28.5 | 24.3 | 5.9 | ±2.8 pp | |
| Ipsos Reid | September 13, 2015 | HTML | 32 | 36 | 32 | ±3.6 pp | |
| Nanos Research | September 13, 2015 | 29.4 | 29.6 | 25.6 | 5.2 | ±2.8 pp | |
| Nanos Research | September 12, 2015 | 30.2 | 28.4 | 26.3 | 4.6 | ±2.8 pp | |
| Nanos Research | September 11, 2015 | 29.9 | 27.0 | 28.3 | 4.0 | ±2.8 pp | |
| Forum Research | September 10, 2015 | 25 | 31 | 22 | 7 | ±3 pp | |
| Nanos Research | September 10, 2015 | 30.2 | 27.3 | 27.5 | 4.5 | ±2.8 pp | |
| Innovative Research | September 10, 2015 | 23 | 24 | 20 | 6 | ||
| Nanos Research | September 9, 2015 | 28.2 | 27.7 | 28.5 | 4.5 | ±2.8 pp | |
| Nanos Research | September 8, 2015 | 25.7 | 29.4 | 28.0 | 5.6 | ±2.8 pp | |
| Ipsos Reid | September 8, 2015 | HTML | 29 | 39 | 32 | ±3.6 pp | |
| Nanos Research | September 6, 2015 | 25.3 | 29.8 | 28.2 | 5.2 | ±2.8 pp | |
| Leger Marketing | September 2, 2015 | 21 | 25 | 21 | ±2.1 pp | ||
| Forum Research | September 1, 2015 | 24 | 31 | 24 | 8 | ±3 pp | |
| Nanos Research | August 28, 2015 | 29 | 28 | 22 | 5 | ±3.1 pp | |
| Innovative Research | August 26, 2015 | 24 | 24 | 18 | 5 | ||
| Ipsos Reid | August 26, 2015 | HTML | 31 | 37 | 32 | ±3.1 pp | |
| Forum Research | August 24, 2015 | 22 | 32 | 22 | 8 | ±3 pp | |
| Angus Reid | August 24, 2015 | 26 | 29 | 18 | ±1.2 pp | ||
| Nanos Research | August 21, 2015 | 29 | 27 | 22 | 4 | ±3.1 pp | |
| Forum Research | August 19, 2015 | 24 | 29 | 21 | 9 | ±3 pp | |
| Nanos Research | August 14, 2015 | 30 | 26 | 21 | 4 | ±3.1 pp | |
| Leger Marketing | August 12, 2015 | 21 | 28 | 20 | ±2.1 pp | ||
| Forum Research | August 11, 2015 | 25 | 28 | 23 | 7 | ±3 pp | |
| Nanos Research | August 7, 2015 | 31 | 27 | 21 | 3 | ±3.1 pp | |
| Forum Research | August 2, 2015 | 24 | 31 | 22 | 5 | ±3 pp | |
| Nanos Research | July 31, 2015 | 31 | 28 | 22 | 3 | ±3.1 pp | |
| Innovative Research | July 30, 2015 | 27 | 31 | 19 | 6 | ||
| Forum Research | July 28, 2015 | 29 | 30 | 19 | 6 | ±3 pp | |
| Nanos Research | July 24, 2015 | 30 | 29 | 22 | 3 | ±3.1 pp | |
| Forum Research | July 20, 2015 | 25 | 29 | 20 | 6 | ±3 pp | |
| Nanos Research | July 17, 2015 | 29 | 29 | 23 | 4 | ±3.1 pp | |
| Leger Marketing | July 16, 2015 | 25 | 27 | 16 | ±2.5 pp | ||
| Forum Research | July 13, 2015 | 22 | 31 | 21 | 5 | ±3 pp | |
| Nanos Research | July 10, 2015 | 26 | 28 | 25 | 4 | ±3.1 pp | |
| Forum Research | July 7, 2015 | 25 | 27 | 23 | 6 | ±3 pp | |
| Nanos Research | July 3, 2015 | 27 | 27 | 26 | 4 | ±3.1 pp | |
| Forum Research | June 29, 2015 | 25 | 29 | 21 | 7 | ±3 pp | |
| Nanos Research | June 26, 2015 | 28 | 25 | 27 | 4 | ±3.1 pp | |
| Nanos Research | June 19, 2015 | 27 | 27 | 27 | 3 | ±3.1 pp | |
| Nanos Research | June 12, 2015 | 29 | 28 | 26 | 3 | ±3.1 pp | |
| Angus Reid | June 7, 2015 | 26 | 24 | 19 | ±1.2 pp | ||
| Nanos Research | June 5, 2015 | 29 | 25 | 27 | 4 | ±3.1 pp | |
| Nanos Research | May 29, 2015 | 29 | 22 | 27 | 4 | ±3.1 pp | |
| Nanos Research | May 22, 2015 | 32 | 20 | 29 | 5 | ±3.1 pp | |
| Nanos Research | May 15, 2015 | 31 | 20 | 29 | 5 | ±3.1 pp | |
| Nanos Research | May 8, 2015 | 31 | 21 | 28 | 5 | ±3.1 pp | |
| Nanos Research | May 1, 2015 | 31 | 21 | 30 | 5 | ±3.1 pp | |
| Leger Marketing | April 30, 2015 | 25 | 19 | 23 | ±2.5 pp | ||
| Nanos Research | April 24, 2015 | 29 | 21 | 30 | 5 | ±3.1 pp | |
| Nanos Research | April 17, 2015 | 29 | 20 | 31 | 5 | ±3.1 pp | |
| Nanos Research | April 10, 2015 | 31 | 19 | 30 | 4 | ±3.1 pp | |
| Ipsos Reid | April 7, 2015 | HTML | 38 | 31 | 30 | ±3.1 pp | |
| Nanos Research | April 3, 2015 | 31 | 18 | 29 | 4 | ±3.1 pp | |
| Nanos Research | March 27, 2015 | 31 | 17 | 31 | 4 | ±3.1 pp | |
| Nanos Research | March 20, 2015 | 34 | 16 | 31 | 4 | ±3.1 pp | |
| Leger Marketing | March 18, 2015 | 25 | 17 | 23 | ±2.5 pp | ||
| Nanos Research | March 13, 2015 | 34 | 16 | 30 | 4 | ±3.1 pp | |
| Nanos Research | March 6, 2015 | 34 | 17 | 31 | 4 | ±3.1 pp | |
| Nanos Research | February 27, 2015 | 34 | 17 | 31 | 4 | ±3.1 pp | |
| Nanos Research | February 20, 2015 | 33 | 16 | 31 | 4 | ±3.1 pp | |
| Nanos Research | February 13, 2015 | 33 | 16 | 31 | 4 | ±3.1 pp | |
| Nanos Research | February 6, 2015 | 32 | 17 | 31 | 3 | ±3.1 pp | |
| Leger Marketing | February 2, 2015 | 25 | 16 | 23 | ±2.5 pp | ||
| Nanos Research | January 30, 2015 | 31 | 17 | 31 | 3 | ±3.1 pp | |
| Nanos Research | January 23, 2015 | 31 | 19 | 30 | 4 | ±3.1 pp | |
| Nanos Research | January 16, 2015 | 31 | 18 | 31 | 5 | ±3.1 pp | |
| Nanos Research | January 9, 2015 | 30 | 18 | 31 | 5 | ±3.1 pp | |
| Nanos Research | January 2, 2015 | 33 | 18 | 30 | 4 | ±3.1 pp | |
| Nanos Research | December 26, 2014 | 33 | 18 | 32 | 4 | ±3.1 pp | |
| Nanos Research | December 19, 2014 | 33 | 18 | 31 | 4 | ±3.1 pp | |
| Angus Reid | December 13, 2014 | 30 | 16 | 28 | ±1.2 pp | ||
| Nanos Research | December 12, 2014 | 33 | 19 | 31 | 3 | ±3.1 pp | |
| Leger Marketing | December 11, 2014 | 24 | 16 | 27 | ±2.5 pp | ||
| Nanos Research | December 5, 2014 | 32 | 20 | 30 | 4 | ±3.1 pp | |
| Nanos Research | November 28, 2014 | 33 | 20 | 29 | 3 | ±3.1 pp | |
| Nanos Research | November 21, 2014 | 32 | 20 | 29 | 3 | ±3.1 pp | |
| Nanos Research | November 14, 2014 | 32 | 20 | 29 | 3 | ±3.1 pp | |
| Nanos Research | November 7, 2014 | 32 | 20 | 30 | 4 | ±3.1 pp | |
| Leger Marketing | November 6, 2014 | 26 | 16 | 28 | ±2.5 pp | ||
| Nanos Research | October 31, 2014 | 29 | 20 | 32 | 4 | ±3.1 pp | |
| Nanos Research | October 24, 2014 | 29 | 19 | 34 | 5 | ±3.1 pp | |
| Nanos Research | October 17, 2014 | 30 | 18 | 35 | 4 | ±3.1 pp | |
| Leger Marketing | October 16, 2014 | 23 | 17 | 26 | ±2.5 pp | ||
| Nanos Research | October 10, 2014 | 30 | 17 | 35 | 4 | ±3.1 pp | |
| Nanos Research | October 3, 2014 | 28 | 18 | 36 | 4 | ±3.1 pp | |
| Nanos Research | September 26, 2014 | 28 | 18 | 35 | 3 | ±3.1 pp | |
| Angus Reid | September 19, 2014 | 27 | 14 | 27 | 4 | ±2.5 pp | |
| Nanos Research | September 19, 2014 | 28 | 18 | 34 | 5 | ±3.1 pp | |
| Nanos Research | September 12, 2014 | 28 | 17 | 34 | 5 | ±3.1 pp | |
| Nanos Research | September 5, 2014 | 29 | 15 | 34 | 5 | ±3.1 pp | |
| Nanos Research | August 29, 2014 | 28 | 15 | 34 | 6 | ±3.1 pp | |
| Nanos Research | August 22, 2014 | 27 | 16 | 32 | 6 | ±3.1 pp | |
| Forum Research | August 19, 2014 | 29 | 15 | 31 | 8 | ±2 pp | |
| Nanos Research | August 15, 2014 | 26 | 19 | 32 | 6 | ±3.1 pp | |
| Nanos Research | August 8, 2014 | 26 | 19 | 31 | 7 | ±3.1 pp | |
| Nanos Research | August 1, 2014 | 29 | 20 | 29 | 6 | ±3.1 pp | |
| Nanos Research | July 25, 2014 | 30 | 20 | 30 | 5 | ±3.1 pp | |
| Forum Research | July 18, 2014 | 27 | 16 | 30 | 7 | ±2 pp | |
| Nanos Research | July 18, 2014 | 31 | 18 | 31 | 5 | ±3.1 pp | |
| Nanos Research | July 11, 2014 | 31 | 19 | 29 | 5 | ±3.1 pp | |
| Nanos Research | July 4, 2014 | 29 | 18 | 30 | 7 | ±3.1 pp | |
| Nanos Research | June 27, 2014 | 28 | 17 | 31 | 7 | ±3.1 pp | |
| Nanos Research | June 20, 2014 | 30 | 16 | 30 | 6 | ±3.1 pp | |
| Forum Research | June 17, 2014 | 28 | 16 | 27 | 8 | ±2 pp | |
| Nanos Research | June 13, 2014 | 28 | 14 | 33 | 7 | ±3.1 pp | |
| Angus Reid | June 12, 2014 | 27 | 17 | 23 | 5 | ±1.2 pp | |
| Nanos Research | June 6, 2014 | 30 | 14 | 32 | 6 | ±3.1 pp | |
| Nanos Research | May 30, 2014 | 32 | 15 | 30 | 6 | ±3.1 pp | |
| Angus Reid | May 23, 2014 | 27 | 17 | 23 | 4 | ±3.4 pp | |
| Forum Research | May 23, 2014 | 26 | 17 | 28 | 8 | ±2 pp | |
| Nanos Research | May 23, 2014 | 30 | 17 | 30 | 7 | ±3.1 pp | |
| Nanos Research | May 16, 2014 | 31 | 19 | 27 | 6 | ±3.1 pp | |
| Nanos Research | May 9, 2014 | 30 | 19 | 27 | 6 | ±3.1 pp | |
| Nanos Research | May 2, 2014 | 27 | 20 | 27 | 6 | ±3.1 pp | |
| Forum Research | April 29, 2014 | 25 | 17 | 30 | 10 | ±2 pp | |
| Nanos Research | April 25, 2014 | 29 | 19 | 26 | 6 | ±3.1 pp | |
| Nanos Research | April 18, 2014 | 29 | 19 | 27 | 6 | ±3.1 pp | |
| Angus Reid | April 15, 2014 | 27 | 16 | 20 | 4 | ±3.4 pp | |
| Nanos Research | April 11, 2014 | 30 | 20 | 27 | 6 | ±3.1 pp | |
| Nanos Research | April 4, 2014 | 31 | 20 | 28 | 6 | ±3.1 pp | |
| Forum Research | March 28, 2014 | 27 | 17 | 29 | 8 | ±2 pp | |
| Nanos Research | March 28, 2014 | 30 | 18 | 29 | 6 | ±3.1 pp | |
| Nanos Research | March 21, 2014 | 29 | 18 | 31 | 5 | ±3.1 pp | |
| Nanos Research | March 14, 2014 | 27 | 17 | 32 | 6 | ±3.1 pp | |
| Angus Reid | March 9, 2014 | 23 | 17 | 24 | 4 | ±1.2 pp | |
| Nanos Research | March 7, 2014 | 26 | 18 | 31 | 6 | ±3.1 pp | |
| Nanos Research | February 28, 2014 | 25 | 19 | 32 | 5 | ±3.1 pp | |
| Nanos Research | February 21, 2014 | 28 | 19 | 29 | 5 | ±3.1 pp | |
| Forum Research | February 19, 2014 | 26 | 16 | 33 | 8 | ±2 pp | |
| Angus Reid | February 16, 2014 | 32 | 22 | 36 | 9 | ±2.5 pp | |
| Nanos Research | February 14, 2014 | 28 | 19 | 30 | 4 | ±3.1 pp | |
| Nanos Research | February 7, 2014 | 28 | 19 | 29 | 4 | ±3.1 pp | |
| Ipsos Reid | February 4, 2014 | 34 | 24 | 42 | – | ±3.5 pp | |
| Nanos Research | January 31, 2014 | 29 | 19 | 29 | 4 | ±3.1 pp | |
| Forum Research | January 25, 2014 | 24 | 18 | 29 | 7 | ±3 pp | |
| Nanos Research | January 24, 2014 | 27 | 21 | 29 | 4 | ±3.1 pp | |
| Forum Research | January 17, 2014 | 25 | 19 | 29 | 7 | ±2 pp | |
| Nanos Research | January 17, 2014 | 28 | 21 | 27 | 4 | ±3.1 pp | |
| Nanos Research | January 10, 2014 | 27 | 20 | 29 | 4 | ±3.1 pp | |
| Nanos Research | January 3, 2014 | 27 | 19 | 29 | 5 | ±3.1 pp | |
| Nanos Research | December 27, 2013 | 27 | 18 | 29 | 5 | ±3.1 pp | |
| Nanos Research | December 20, 2013 | 26 | 18 | 30 | 5 | ±3.1 pp | |
| Forum Research | December 13, 2013 | 27 | 17 | 29 | 6 | ±2 pp | |
| Nanos Research | December 13, 2013 | 28 | 18 | 27 | 6 | ±3.1 pp | |
| Nanos Research | December 6, 2013 | 27 | 20 | 26 | 6 | ±3.1 pp | |
| Nanos Research | November 29, 2013 | 27 | 20 | 26 | 5 | ±3.1 pp | |
| Nanos Research | November 22, 2013 | 29 | 20 | 27 | 5 | ±3.1 pp | |
| Nanos Research | November 15, 2013 | 27 | 19 | 29 | 5 | ±3.1 pp | |
| Forum Research | November 13, 2013 | 25 | 17 | 27 | 7 | ±2 pp | |
| Nanos Research | November 8, 2013 | 29 | 17 | 31 | 4 | ±3.1 pp | |
| Nanos Research | November 1, 2013 | 30 | 16 | 32 | 4 | ±3.1 pp | |
| Nanos Research | October 25, 2013 | 30 | 16 | 32 | 5 | ±3.1 pp | |
| Forum Research | October 23, 2013 | 25 | 15 | 31 | 9 | ±3 pp | |
| Forum Research | October 22, 2013 | 25 | 13 | 29 | 7 | ±3 pp | |
| Abacus Data | October 22, 2013 | 24 | 12 | 26 | 4 | ±2.6 pp | |
| Nanos Research | October 18, 2013 | 31 | 16 | 32 | 5 | ±3.1 pp | |
| Nanos Research | October 11, 2013 | 30 | 16 | 33 | 5 | ±3.1 pp | |
| Nanos Research | October 4, 2013 | 29 | 15 | 31 | 5 | ±3.1 pp | |
| Forum Research | September 17, 2013 | 27 | 15 | 30 | 6 | ±3 pp | |
| Harris-Decima | August 25, 2013 | 29 | 14 | 33 | – | ±3.1 pp | |
| Forum Research | August 23, 2013 | 24 | 16 | 32 | 9 | ±3 pp | |
| Leger Marketing | June 19, 2013 | 23 | 14 | 27 | 6 | ±2.5 pp | |
| Harris-Decima | April 21, 2013 | 31 | 18 | 33 | – | ±3.1 pp |
See also
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