| Results of SurveyUSA News Poll #14629 |
 | 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 | Does US Need a D | Gun Ownership | Attend Religious Service | Evangelical? | Own a Gun? | Income | Region | ||||||||||||||||||||||
| Margin of Sampling Error: ± 3.9% | Male | Female | 18-34 | 35-49 | 50-64 | 65+ | White | Black | Hispanic | Other | Republic | Democrat | Independ | Conserva | Moderate | Liberal | Pro-life | Pro-choi | Need | Not Need | Yes | No | Regularl | Occasion | Almost N | Yes | No | Yes | No | < $50K | > $50K | Northeas | Southeas | Southwes | Northwes | |
| Approve | 63% | 63% | 62% | 44% | 70% | 69% | 75% | 63% | ** | ** | ** | 82% | 52% | 62% | 77% | 63% | 55% | 71% | 59% | 68% | 64% | 69% | 59% | 72% | 56% | 55% | 73% | 60% | 67% | 61% | 62% | 66% | 61% | 55% | 69% | 68% |
| Disapprove | 29% | 27% | 30% | 41% | 23% | 29% | 18% | 28% | ** | ** | ** | 11% | 38% | 33% | 16% | 30% | 38% | 18% | 36% | 30% | 28% | 26% | 30% | 21% | 34% | 34% | 21% | 32% | 27% | 28% | 30% | 26% | 27% | 36% | 25% | 27% |
| Not Sure | 9% | 10% | 8% | 16% | 7% | 2% | 7% | 9% | ** | ** | ** | 6% | 11% | 5% | 8% | 7% | 7% | 10% | 5% | 2% | 8% | 6% | 11% | 6% | 10% | 11% | 6% | 9% | 6% | 11% | 8% | 8% | 12% | 8% | 6% | 5% |
| 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% |
| Composition of Adults | 100% | 48% | 52% | 29% | 29% | 21% | 20% | 94% | 2% | 2% | 2% | 28% | 40% | 28% | 30% | 43% | 15% | 45% | 50% | 18% | 73% | 46% | 53% | 45% | 30% | 24% | 29% | 64% | 45% | 54% | 48% | 52% | 40% | 21% | 22% | 17% |
 | 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 | Does US Need a D | Gun Ownership | Attend Religious Service | Evangelical? | Own a Gun? | Income | Region | ||||||||||||||||||||||
| Margin of Sampling Error: ± 4.1% | Male | Female | 18-34 | 35-49 | 50-64 | 65+ | White | Black | Hispanic | Other | Republic | Democrat | Independ | Conserva | Moderate | Liberal | Pro-life | Pro-choi | Need | Not Need | Yes | No | Regularl | Occasion | Almost N | Yes | No | Yes | No | < $50K | > $50K | Northeas | Southeas | Southwes | Northwes | |
| Approve | 55% | 52% | 57% | 48% | 56% | 59% | 58% | 55% | ** | ** | ** | 36% | 65% | 56% | 37% | 62% | 71% | 41% | 66% | 56% | 56% | 51% | 58% | 47% | 60% | 63% | 47% | 57% | 49% | 61% | 61% | 49% | 51% | 60% | 55% | 57% |
| Disapprove | 38% | 41% | 35% | 37% | 37% | 40% | 37% | 37% | ** | ** | ** | 55% | 25% | 40% | 54% | 31% | 23% | 47% | 30% | 42% | 38% | 44% | 32% | 48% | 30% | 30% | 45% | 36% | 46% | 30% | 34% | 42% | 36% | 38% | 40% | 38% |
| Not Sure | 8% | 7% | 8% | 16% | 6% | 1% | 5% | 8% | ** | ** | ** | 9% | 9% | 4% | 9% | 7% | 6% | 12% | 4% | 1% | 6% | 5% | 10% | 6% | 11% | 7% | 8% | 7% | 5% | 9% | 5% | 9% | 13% | 2% | 5% | 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% |
| Composition of Adults | 100% | 48% | 52% | 29% | 29% | 21% | 20% | 94% | 2% | 2% | 2% | 28% | 40% | 28% | 30% | 43% | 15% | 45% | 50% | 18% | 73% | 46% | 53% | 45% | 30% | 24% | 29% | 64% | 45% | 54% | 48% | 52% | 40% | 21% | 22% | 17% |