| Year | Age | State | Party | Office | District | Stage | Pos | Votes | % |
|---|---|---|---|---|---|---|---|---|---|
| 1986 | MD | D | State House | District 020 | Primary | 1 | 6,912 | 16.9% | |
| 1986 | MD | D | State House | District 020 | General | 1 | 17,596 | 23.8% | |
| 1988 | MD | D | U.S. House | District 08 | Primary | 1 | 36,734 | 56.5% | |
| 1988 | MD | D | U.S. House | District 08 | General | 2 | 102,478 | 37.3% | |
| 1990 | MD | D | State House | District 020 | Primary | 1 | 8,202 | 21.7% | |
| 1990 | MD | D | State House | District 020 | General | 3 | 17,871 | 33.0% | |
| 1994 | MD | D | State House | District 020 | Primary | 3 | 7,307 | 23.6% | |
| 1994 | MD | D | State House | District 020 | General | 3 | 18,854 | 28.5% | |
| 1998 | MD | D | State House | District 020 | Primary | 3 | 6,487 | 24.8% | |
| 1998 | MD | D | State House | District 020 | General | 3 | 21,208 | 25.8% | |
| 2002 | MD | D | State House | District 020 | Primary | 2 | 8,278 | 24.1% | |
| 2002 | MD | D | State House | District 020 | General | 2 | 18,273 | 24.6% | |
| 2006 | MD | D | Comptroller | Primary | 1 | 215,192 | 36.5% | ||
| 2006 | MD | D | Comptroller | General | 1 | 1,016,677 | 59.0% | ||
| 2010 | MD | D | Comptroller | Primary | 1 | 393,587 | 100.0% | ||
| 2010 | MD | D | Comptroller | General | 1 | 1,087,836 | 61.1% | ||
| 2014 | MD | D | Comptroller | Primary | 1 | 369,546 | 100.0% | ||
| 2014 | MD | D | Comptroller | General | 1 | 1,025,257 | 62.5% | ||
| 2018 | MD | D | Comptroller | Primary | 1 | 510,159 | 100.0% | ||
| 2018 | MD | D | Comptroller | General | 1 | 1,620,264 | 72.1% | ||
| 2022 | MD | D | Governor | Primary | 3 | 141,586 | 21.1% | ||
|
Age: Age as of July 1 of the year pertaining to this election. |