McCain (R) | Obama (D) | Other / Not sure | Date | |
(12) Rasmussen Reports | 43% | 51% | 6% | Sept. 25 |
(11) Marist College | 41% | 51% | 8% | Sept. 18-21 |
(10) Research 2000 | 39% | 53% | 8% | Sept. 15-17 |
(9) SurveyUSA | 43% | 54% | 3% | Sept. 17-18 |
(8) University of Wisc-Mad | 45% | 45% | 10% | Sept. 14-17 |
(7) Selzer & Co. | 40% | 52% | 8% | Sept. 8-10 |
(6) Opinion Research Corp. | 40% | 55% | 5% | Aug. 31-Sept. 2 |
(5) Univ. of Iowa | 43% | 50% | 7% | Aug. 4-13 |
(4) Rasmussen Reports | 44% | 49% | 7% | Aug. 7 |
(3) Rasmussen Reports | 38% | 48% | 14% | Jul. 10 |
(2) SurveyUSA | 45% | 49% | 6% | Jun. 13-16 |
(1) Rasmussen Reports | 38% | 45% | 16% | Jun. 10 |
(12) Rasmussen Reports - Telephone interviews with 700 likely Iowa voters, conducted on Sept. 25, 2008. Margin of error is 4 per cent.
(11) Marist College Institute for Public Opinion - Telephone interviews with 467 likely Iowa voters, conducted from Sept. 18 to Sept. 21, 2008. Margin of error is 4.5 per cent.
(10) Research 2000 - Telephone interviews with 600 likely Iowa voters, conducted from Sept. 15 to Sept. 17, 2008. Margin of error is 4 per cent.
(9) SurveyUSA - Telephone interviews with 702 likely Iowa voters, conducted on Sept. 17 and Sept. 18, 2008. Margin of error is 3.8 per cent.
(8) University of Wisconsin-Madison - Telephone interviews with 643 registered Iowa voters, conducted from Sept 14 to Sept. 17, 2008. Margin of error is 4 per cent.
(7) Selzer & Co. - Telephone interviews with 616 likely Iowa voters, conducted from Sept. 8 to Sept. 10, 2008. Margin of error is 4 per cent.
(6) Opinion Research Corporation - Telephone interviews with 828 registered Iowa voters, conducted from Aug. 31 to Sept. 2, 2008. Margin of error is 3.5 per cent.
(5) University of Iowa - Telephone interviews with 617 likely Iowa voters, conducted from Aug. 4 to Aug. 13, 2008. Margin of error is 4 per cent.
(4) Rasmussen Reports - Telephone interviews with 700 likely Iowa voters, conducted on Aug. 7, 2008. Margin of error is 4 per cent.
(3) Rasmussen Reports - Telephone interviews with 500 likely Iowa voters, conducted on Jul. 10, 2008. Margin of error is 4.1 per cent.
(2) SurveyUSA - Telephone interviews with 528 likely Iowa voters, conducted from Jun. 13 to Jun. 16, 2008. Margin of error is 4.4 per cent.
(1) Rasmussen Reports - Telephone interviews with 500 likely Iowa voters, conducted on Jun. 10, 2008. Margin of error is 4.1 per cent.
Compiled by Angus-Reid Global Monitor
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