| Year | Age | State | Party | Office | District | Stage | Pos | Votes | % |
|---|---|---|---|---|---|---|---|---|---|
| 1982 | IA | D | U.S. House | District 01 | Primary | 1 | 12,553 | 63.2% | |
| 1982 | IA | D | U.S. House | District 01 | General | 2 | 61,734 | 40.8% | |
| 1988 | IA | D | U.S. House | District 01 | Primary | 1 | 12,926 | 69.5% | |
| 1988 | IA | D | U.S. House | District 01 | General | 2 | 71,280 | 38.4% | |
| 2004 | IA | D | U.S. House | District 01 | Primary | 1 | 7,126 | 60.0% | |
| 2004 | IA | D | U.S. House | District 01 | General | 2 | 125,490 | 43.3% | |
| 2006 | IA | D | U.S. House | District 01 | Primary | 3 | 7,453 | 25.6% | |
|
Age: Age as of July 1 of the year pertaining to this election. |