| Year | Age | State | Party | Office | District | Stage | Pos | Votes | % |
|---|---|---|---|---|---|---|---|---|---|
| 1992 | IL | R | State House | District 049 | General | 1 | 23,135 | 100.0% | |
| 1994 | IL | R | State House | District 049 | General | 1 | 15,502 | 100.0% | |
| 1996 | IL | R | State House | District 049 | General | 1 | 17,590 | 62.0% | |
| 1998 | IL | R | State House | District 049 | General | 1 | 13,272 | 67.0% | |
| 2000 | IL | R | State House | District 049 | General | 1 | 20,582 | 100.0% | |
| 2002 | IL | R | State House | District 045 | General | 1 | 17,117 | 69.2% | |
| 2004 | IL | R | State Senate | District 023 | Primary | 1 | 10,247 | 54.3% | |
| 2004 | IL | R | State Senate | District 023 | General | 1 | 62,117 | 100.0% | |
| 2006 | IL | R | Comptroller | Primary | 1 | 580,148 | 100.0% | ||
| 2006 | IL | R | Comptroller | General | 2 | 1,076,913 | 31.5% | ||
| 2008 | IL | R | State Senate | District 023 | Primary | 1 | 16,874 | 100.0% | |
| 2008 | IL | R | State Senate | District 023 | General | 1 | 61,795 | 99.9% | |
| 2012 | IL | R | State Senate | District 023 | Primary | 1 | 10,366 | 57.5% | |
| 2012 | IL | R | State Senate | District 023 | General | 2 | 38,920 | 48.8% | |
|
Age: Age as of July 1 of the year pertaining to this election. |