| Year | Age | State | Party | Office | District | Stage | Pos | Votes | % |
|---|---|---|---|---|---|---|---|---|---|
| 2000 | MT | D | Attorney General | Primary | 2 | 26,291 | 30.0% | ||
| 2008 | MT | D | Attorney General | Primary | 1 | 63,276 | 42.0% | ||
| 2008 | MT | D | Attorney General | General | 1 | 245,669 | 52.6% | ||
| 2012 | MT | D | Governor | Primary | 1 | 76,738 | 86.6% | ||
| 2012 | MT | D | Governor | General | 1 | 236,450 | 48.9% | ||
| 2016 | MT | D | Governor | Primary | 1 | 111,675 | 91.2% | ||
| 2016 | MT | D | Governor | General | 1 | 255,933 | 50.2% | ||
| 2020 | MT | D | U.S. Senate Class 2 | Primary | 1 | 144,949 | 95.5% | ||
| 2020 | MT | D | U.S. Senate Class 2 | General | 2 | 272,463 | 45.0% | ||
|
Age: Age as of July 1 of the year pertaining to this election. |