| Year | Age | State | Party | Office | District | Stage | Pos | Votes | % |
|---|---|---|---|---|---|---|---|---|---|
| 2008 | MT | D | Superintendent of Public Instr. | Primary | 1 | 54,031 | 37.5% | ||
| 2008 | MT | D | Superintendent of Public Instr. | General | 1 | 232,853 | 51.0% | ||
| 2012 | MT | D | Superintendent of Public Instr. | Primary | 1 | 82,788 | 100.0% | ||
| 2012 | MT | D | Superintendent of Public Instr. | General | 1 | 235,397 | 50.2% | ||
| 2016 | MT | D | U.S. House | At-Large District | Primary | 1 | 112,821 | 100.0% | |
| 2016 | MT | D | U.S. House | At-Large District | General | 2 | 205,919 | 40.5% | |
|
Age: Age as of July 1 of the year pertaining to this election. |