| Results of SurveyUSA News Poll #15545 |
 | Do you approve or disapprove of the job Charles Grassley is doing as United States Senator? |
| 600 Adults | All | Gender | Age | Race | Home Ownership | Marital Status | Job Status | Party Affiliation | Ideology | Income | Region | ||||||||||||||||||||||||||
| Margin of Sampling Error: ± 4% | Male | Female | 18-34 | 35-49 | 50-64 | 65+ | White | Black | Hispanic | Other | Own | Rent | Single | Married | Separate | Divorced | Widowed | Un-marri | Student | Full-tim | Part-tim | Homemake | Unemploy | Retired | Republic | Democrat | Independ | Conserva | Moderate | Liberal | < $50K | > $50K | Northeas | Southeas | Southwes | Northwes | |
| Approve | 62% | 59% | 65% | 66% | 51% | 62% | 72% | 62% | ** | ** | ** | 63% | 60% | 58% | 62% | ** | 65% | 70% | ** | 45% | 64% | 74% | 53% | 41% | 68% | 69% | 65% | 55% | 71% | 63% | 48% | 64% | 62% | 59% | 59% | 68% | 65% |
| Disapprove | 30% | 35% | 26% | 23% | 40% | 32% | 26% | 30% | ** | ** | ** | 31% | 30% | 27% | 32% | ** | 26% | 23% | ** | 27% | 30% | 22% | 40% | 46% | 27% | 24% | 29% | 36% | 22% | 31% | 46% | 28% | 32% | 35% | 34% | 27% | 22% |
| Not Sure | 7% | 6% | 9% | 10% | 9% | 7% | 2% | 7% | ** | ** | ** | 6% | 10% | 14% | 6% | ** | 9% | 7% | ** | 27% | 6% | 4% | 7% | 13% | 5% | 7% | 6% | 8% | 7% | 6% | 6% | 8% | 6% | 6% | 6% | 5% | 14% |
| 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% | 100% | 100% | 100% | 100% | 100% |
| Composition of Adults | 100% | 48% | 52% | 29% | 28% | 23% | 20% | 94% | 2% | 2% | 2% | 73% | 24% | 15% | 62% | 1% | 11% | 8% | 2% | 6% | 48% | 13% | 9% | 7% | 17% | 24% | 38% | 34% | 31% | 37% | 19% | 56% | 44% | 39% | 21% | 22% | 19% |
 | Do you approve or disapprove of the job Tom Harkin is doing as United States Senator? |
| 600 Adults | All | Gender | Age | Race | Home Ownership | Marital Status | Job Status | Party Affiliation | Ideology | Income | Region | ||||||||||||||||||||||||||
| Margin of Sampling Error: ± 4% | Male | Female | 18-34 | 35-49 | 50-64 | 65+ | White | Black | Hispanic | Other | Own | Rent | Single | Married | Separate | Divorced | Widowed | Un-marri | Student | Full-tim | Part-tim | Homemake | Unemploy | Retired | Republic | Democrat | Independ | Conserva | Moderate | Liberal | < $50K | > $50K | Northeas | Southeas | Southwes | Northwes | |
| Approve | 58% | 58% | 58% | 68% | 56% | 53% | 50% | 59% | ** | ** | ** | 54% | 68% | 71% | 54% | ** | 65% | 51% | ** | 56% | 58% | 70% | 57% | 61% | 48% | 28% | 81% | 53% | 36% | 67% | 74% | 58% | 59% | 54% | 54% | 63% | 63% |
| Disapprove | 37% | 41% | 34% | 25% | 39% | 43% | 44% | 36% | ** | ** | ** | 42% | 25% | 21% | 42% | ** | 30% | 40% | ** | 27% | 39% | 26% | 31% | 39% | 46% | 64% | 16% | 41% | 59% | 28% | 24% | 35% | 38% | 40% | 40% | 34% | 31% |
| Not Sure | 5% | 2% | 9% | 7% | 5% | 4% | 5% | 5% | ** | ** | ** | 5% | 7% | 8% | 5% | ** | 5% | 9% | ** | 18% | 3% | 4% | 12% | 0% | 7% | 8% | 3% | 5% | 5% | 5% | 2% | 7% | 4% | 6% | 6% | 3% | 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% | 100% | 100% | 100% | 100% | 100% |
| Composition of Adults | 100% | 48% | 52% | 29% | 28% | 23% | 20% | 94% | 2% | 2% | 2% | 73% | 24% | 15% | 62% | 1% | 11% | 8% | 2% | 6% | 48% | 13% | 9% | 7% | 17% | 24% | 38% | 34% | 31% | 37% | 19% | 56% | 44% | 39% | 21% | 22% | 19% |