| Year | Age | State | Party | Office | District | Stage | Pos | Votes | % |
|---|---|---|---|---|---|---|---|---|---|
| 1970 | IA | D | State House | District 069 | Primary | 1 | 1,267 | 48.5% | |
| 1970 | IA | D | State House | District 069 | General | 1 | 4,878 | 59.5% | |
| 1972 | IA | D | State House | District 073 | General | 1 | 9,114 | 68.9% | |
| 1974 | IA | D | State House | District 073 | General | 1 | 5,565 | 99.9% | |
| 1976 | IA | D | State House | District 073 | Primary | 1 | 1,162 | 58.8% | |
| 1976 | IA | D | State House | District 073 | General | 1 | 8,221 | 62.0% | |
| 1978 | IA | D | State Senate | District 037 | Primary | 1 | 2,502 | 55.6% | |
| 1978 | IA | D | State Senate | District 037 | General | 1 | 10,781 | 63.6% | |
| 1982 | IA | D | State Senate | District 023 | General | 1 | 14,694 | 64.2% | |
| 1986 | IA | D | Lt. Governor | Primary | 2 | 39,640 | 34.3% | ||
| 2004 | IA | D | U.S. Senate Class 3 | Primary | 1 | 52,318 | 100.0% | ||
| 2004 | IA | D | U.S. Senate Class 3 | General | 2 | 412,365 | 27.9% | ||
|
Age: Age as of July 1 of the year pertaining to this election. |