| Year | Age | State | Party | Office | District | Stage | Pos | Votes | % |
|---|---|---|---|---|---|---|---|---|---|
| 1986 | TX | R | Land Commissioner | Primary | 2 | 103,524 | 27.2% | ||
| 1986 | TX | R | Land Commissioner | Primary Runoff | 2 | 46,558 | 37.0% | ||
| 1990 | TX | R | Land Commissioner | Primary | 2 | 205,275 | 34.0% | ||
| 1990 | TX | R | Land Commissioner | Primary Runoff | 2 | 47,351 | 33.4% | ||
| 2012 | TX | D | U.S. Senate Class 1 | Primary | 2 | 128,746 | 25.9% | ||
| 2012 | TX | D | U.S. Senate Class 1 | Primary Runoff | 2 | 87,365 | 37.0% | ||
| 2018 | TX | D | Governor | Primary | 4 | 54,935 | 5.4% | ||
|
Age: Age as of July 1 of the year pertaining to this election. |