| Year | Age | State | Party | Office | District | Stage | Pos | Votes | % |
|---|---|---|---|---|---|---|---|---|---|
| 1989 | IA | D | State House | District 035 | Special | 1 | 3,004 | 50.8% | |
| 1990 | IA | D | State House | District 035 | General | 1 | 7,101 | 100.0% | |
| 1992 | IA | D | State House | District 036 | General | 1 | 9,697 | 100.0% | |
| 1994 | IA | D | State House | District 036 | General | 1 | 6,153 | 100.0% | |
| 1996 | IA | D | State House | District 036 | General | 1 | 8,072 | 69.8% | |
| 1998 | IA | D | State House | District 036 | General | 1 | 6,000 | 68.7% | |
| 2000 | IA | D | State House | District 036 | General | 1 | 9,319 | 100.0% | |
| 2002 | IA | D | State House | District 028 | General | 1 | 7,408 | 100.0% | |
| 2004 | IA | D | State House | District 028 | Primary | 1 | 651 | 100.0% | |
| 2004 | IA | D | State House | District 028 | General | 1 | 9,101 | 66.0% | |
| 2006 | IA | D | State House | District 028 | General | 1 | 7,417 | 100.0% | |
| 2008 | IA | D | State House | District 028 | Primary | 1 | 458 | 100.0% | |
| 2008 | IA | D | State House | District 028 | General | 1 | 9,518 | 69.2% | |
| 2010 | IA | D | State House | District 028 | Primary | 1 | 814 | 100.0% | |
| 2010 | IA | D | State House | District 028 | General | 1 | 5,188 | 51.8% | |
| 2012 | IA | D | State House | District 099 | General | 1 | 10,098 | 59.6% | |
| 2014 | IA | D | U.S. House | District 01 | Primary | 1 | 10,189 | 36.7% | |
| 2014 | IA | D | U.S. House | District 01 | General | 2 | 141,145 | 48.8% | |
| 2016 | IA | D | U.S. House | District 01 | Primary | 2 | 10,090 | 32.4% | |
|
Age: Age as of July 1 of the year pertaining to this election. |