| Year | Age | State | Party | Office | District | Stage | Pos | Votes | % |
|---|---|---|---|---|---|---|---|---|---|
| 1990 | TX | D | State House | District 115 | General | 1 | 10,958 | 71.6% | |
| 1992 | TX | D | State House | District 115 | General | 1 | 19,264 | 85.5% | |
| 1994 | TX | D | State House | District 115 | General | 1 | 12,761 | 100.0% | |
| 1996 | TX | D | State House | District 115 | General | 1 | 18,276 | 100.0% | |
| 1998 | TX | D | State House | District 115 | General | 1 | 10,943 | 100.0% | |
| 1999 | TX | D | State Senate | District 026 | Special | 1 | 27,139 | 45.7% | |
| 2000 | TX | D | State Senate | District 026 | Primary | 1 | 13,381 | 54.4% | |
| 2000 | TX | D | State Senate | District 026 | General | 1 | 105,771 | 100.0% | |
| 2002 | TX | D | State Senate | District 026 | General | 1 | 74,163 | 100.0% | |
| 2004 | TX | D | State Senate | District 026 | Primary | 1 | 16,676 | 82.0% | |
| 2004 | TX | D | State Senate | District 026 | General | 1 | 105,625 | 57.1% | |
| 2008 | TX | D | State Senate | District 026 | Primary | 1 | 68,058 | 100.0% | |
| 2008 | TX | D | State Senate | District 026 | General | 1 | 136,913 | 81.4% | |
| 2012 | TX | D | State Senate | District 026 | Primary | 1 | 17,736 | 100.0% | |
| 2012 | TX | D | State Senate | District 026 | General | 1 | 141,040 | 80.3% | |
| 2014 | TX | D | Lt. Governor | Primary | 1 | 451,822 | 100.0% | ||
| 2014 | TX | D | Lt. Governor | General | 2 | 1,813,974 | 38.7% | ||
|
Age: Age as of July 1 of the year pertaining to this election. |