| Year | Age | State | Party | Office | District | Stage | Pos | Votes | % |
|---|---|---|---|---|---|---|---|---|---|
| 1982 | MD | D | U.S. House | District 02 | Primary | 2 | 12,227 | 16.4% | |
| 1984 | MD | D | U.S. House | District 02 | Primary | 2 | 5,683 | 10.4% | |
| 1988 | MD | D | U.S. House | District 02 | Primary | 2 | 13,958 | 34.4% | |
| 2006 | MD | D | U.S. Senate Class 1 | Primary | 16 | 1,848 | 0.3% | ||
| 2010 | MD | D | U.S. Senate Class 3 | Primary | 4 | 11,049 | 2.3% | ||
| 2012 | MD | D | U.S. Senate Class 1 | Primary | 6 | 4,376 | 1.3% | ||
| 2014 | MD | D | U.S. House | District 02 | Primary | 3 | 6,164 | 11.0% | |
| 2016 | MD | D | U.S. Senate Class 3 | Primary | 9 | 5,932 | 0.7% | ||
| 2018 | MD | R | U.S. Senate Class 1 | Primary | 5 | 8,848 | 5.0% | ||
| 2020 | MD | R | U.S. House | District 02 | Primary | 7 | 1,562 | 5.0% | |
|
Age: Age as of July 1 of the year pertaining to this election. |