| Year | Age | State | Party | Office | District | Stage | Pos | Votes | % |
|---|---|---|---|---|---|---|---|---|---|
| 2002 | TX | D | Attorney General | Primary | 1 | 698,366 | 100.0% | ||
| 2002 | TX | D | Attorney General | General | 2 | 1,841,359 | 41.1% | ||
| 2006 | TX | D | State Senate | District 014 | Primary | 1 | 14,868 | 100.0% | |
| 2006 | TX | D | State Senate | District 014 | General | 1 | 127,223 | 80.3% | |
| 2010 | TX | D | State Senate | District 014 | Primary | 1 | 27,463 | 100.0% | |
| 2010 | TX | D | State Senate | District 014 | General | 1 | 115,949 | 60.7% | |
| 2012 | TX | D | State Senate | District 014 | Primary | 1 | 32,412 | 100.0% | |
| 2012 | TX | D | State Senate | District 014 | General | 1 | 212,527 | 80.3% | |
| 2014 | TX | D | State Senate | District 014 | Primary | 1 | 36,761 | 100.0% | |
| 2014 | TX | D | State Senate | District 014 | General | 1 | 154,391 | 80.0% | |
| 2018 | TX | D | State Senate | District 014 | General | 1 | 276,052 | 71.9% | |
|
Age: Age as of July 1 of the year pertaining to this election. |