| Year | Age | State | Party | Office | District | Stage | Pos | Votes | % |
|---|---|---|---|---|---|---|---|---|---|
| 1990 | TX | D | State House | District 009 | General | 1 | 14,685 | 56.8% | |
| 1992 | TX | D | State House | District 008 | Primary | 1 | 16,403 | 100.0% | |
| 1992 | TX | D | State House | District 008 | General | 1 | 31,437 | 72.7% | |
| 1994 | TX | D | State House | District 008 | Primary | 1 | 14,551 | 100.0% | |
| 1994 | TX | D | State House | District 008 | General | 1 | 23,720 | 100.0% | |
| 1996 | TX | D | State House | District 008 | Primary | 1 | 15,152 | 100.0% | |
| 1996 | TX | D | State House | District 008 | General | 1 | 26,364 | 61.1% | |
| 1998 | TX | D | State House | District 008 | Primary | 1 | 10,684 | 100.0% | |
| 1998 | TX | D | State House | District 008 | General | 1 | 17,496 | 61.6% | |
| 2000 | TX | D | State House | District 008 | Primary | 1 | 10,598 | 100.0% | |
| 2000 | TX | D | State House | District 008 | General | 1 | 32,833 | 100.0% | |
| 2004 | TX | D | State Senate | District 001 | Special Open Primary | 1 | 27,299 | 39.5% | |
| 2004 | TX | D | State Senate | District 001 | Special | 2 | 43,094 | 48.1% | |
| 2012 | TX | D | U.S. Senate Class 1 | Primary | 1 | 174,772 | 35.1% | ||
| 2012 | TX | D | U.S. Senate Class 1 | Primary Runoff | 1 | 148,940 | 63.0% | ||
| 2012 | TX | D | U.S. Senate Class 1 | General | 2 | 3,194,927 | 40.6% | ||
|
Age: Age as of July 1 of the year pertaining to this election. |