| Results of SurveyUSA News Poll #12349 |
 | Do you approve or disapprove of the job Charles Grassley is doing as United States Senator? |
| 600 Adults | All | Gender | Age | Race | Party Affiliation | Ideology | Abortion | Global Warming | Does The U.S. Ne | Member Of Milita | Vietnam | Iraq | Region | |||||||||||||||||||
| Margin of Sampling Error: ± 4% | Male | Female | 18-34 | 35-54 | 55+ | White | Black | Hispanic | Other | Republic | Democrat | Independ | Conserva | Moderate | Liberal | Pro-life | Pro-choi | Real | Made-up | Needs a | Does Not | Yes | No | US Won | US Lost | Will Win | Will Los | Northeas | Southeas | Southwes | Northwes | |
| Approve | 61% | 60% | 63% | 59% | 59% | 66% | 62% | ** | ** | ** | 79% | 47% | 64% | 76% | 63% | 44% | 68% | 57% | 59% | 66% | 57% | 62% | 51% | 64% | 68% | 60% | 76% | 53% | 59% | 63% | 56% | 69% |
| Disapprove | 31% | 35% | 28% | 28% | 36% | 29% | 31% | ** | ** | ** | 18% | 43% | 30% | 21% | 30% | 50% | 26% | 36% | 35% | 27% | 40% | 30% | 41% | 30% | 24% | 36% | 19% | 41% | 32% | 31% | 37% | 24% |
| Not Sure | 7% | 5% | 9% | 13% | 5% | 5% | 7% | ** | ** | ** | 3% | 9% | 6% | 3% | 8% | 6% | 6% | 6% | 7% | 7% | 3% | 7% | 8% | 6% | 8% | 4% | 5% | 6% | 8% | 5% | 7% | 7% |
| Total | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
| Composition of Adults | 100% | 48% | 52% | 30% | 38% | 32% | 94% | 2% | 2% | 2% | 23% | 39% | 34% | 26% | 43% | 20% | 40% | 56% | 70% | 23% | 22% | 74% | 25% | 75% | 15% | 64% | 26% | 53% | 41% | 20% | 21% | 18% |
 | Do you approve or disapprove of the job Tom Harkin is doing as United States Senator? |
| 600 Adults | All | Gender | Age | Race | Party Affiliation | Ideology | Abortion | Global Warming | Does The U.S. Ne | Member Of Milita | Vietnam | Iraq | Region | |||||||||||||||||||
| Margin of Sampling Error: ± 4.1% | Male | Female | 18-34 | 35-54 | 55+ | White | Black | Hispanic | Other | Republic | Democrat | Independ | Conserva | Moderate | Liberal | Pro-life | Pro-choi | Real | Made-up | Needs a | Does Not | Yes | No | US Won | US Lost | Will Win | Will Los | Northeas | Southeas | Southwes | Northwes | |
| Approve | 55% | 51% | 59% | 52% | 56% | 57% | 56% | ** | ** | ** | 31% | 75% | 49% | 32% | 64% | 65% | 39% | 66% | 63% | 34% | 54% | 56% | 53% | 55% | 47% | 59% | 37% | 67% | 54% | 56% | 53% | 60% |
| Disapprove | 38% | 45% | 32% | 36% | 39% | 39% | 38% | ** | ** | ** | 65% | 18% | 45% | 64% | 30% | 28% | 55% | 29% | 30% | 61% | 43% | 38% | 41% | 39% | 45% | 38% | 60% | 29% | 37% | 43% | 40% | 34% |
| Not Sure | 6% | 4% | 9% | 12% | 4% | 4% | 6% | ** | ** | ** | 4% | 7% | 6% | 4% | 6% | 7% | 5% | 6% | 6% | 5% | 3% | 6% | 6% | 6% | 7% | 3% | 2% | 4% | 9% | 1% | 6% | 6% |
| Total | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
| Composition of Adults | 100% | 48% | 52% | 30% | 38% | 32% | 94% | 2% | 2% | 2% | 23% | 39% | 34% | 26% | 43% | 20% | 40% | 56% | 70% | 23% | 22% | 74% | 25% | 75% | 15% | 64% | 26% | 53% | 41% | 20% | 21% | 18% |