| Year | Age | State | Party | Office | District | Stage | Pos | Votes | % |
|---|---|---|---|---|---|---|---|---|---|
| 1962 | IA | D | U.S. Senate Class 3 | Primary | 1 | 71,395 | 100.0% | ||
| 1962 | IA | D | U.S. Senate Class 3 | General | 2 | 376,602 | 46.6% | ||
| 1966 | IA | D | U.S. Senate Class 2 | Primary | 1 | 39,870 | 50.1% | ||
| 1966 | IA | D | U.S. Senate Class 2 | General | 2 | 324,114 | 37.8% | ||
|
Age: Age as of July 1 of the year pertaining to this election. |