2012 Carson and incumbent Representative Tona Rozum were unopposed for the June 5, 2012 Republican Primary; and won the four-way November 6, 2012 General election where Carson took the first seat with 5,841 votes (32%) and Representative Rozum took the second seat against Democratic nominees James Schorzmann and Dave Mitchell, who had run for the seat in 2006 and 2008.
2006 When incumbent Republican Representative Lou Sebert was term limited and left the Legislature and left a District 20 seat open, Carson and incumbent Representative Mike Vehle were unopposed for the June 6, 2006 Republican Primary, and won the four-way November 7, 2006 General election, where Carson took the first seat with 4,530 votes (29.4%) and Representative Vehle took the second seat ahead of Democratic nominees Susan Steele and David Mitchell.
2008 With incumbent Republican Representative Vehle running for South Dakota Senate and leavind a District 20 seat open, Carson and Noel Hamiel were unopposed for the June 3, 2008 Republican Primary; in the four-way November 4, 2008 General election, Carson took the first seat with 5,599 votes (33.1%) and Hamiel took the second seat ahead of Democratic nominees Tony Sieler and returning 2006 opponent David Mitchell.
2010 With incumbent Republican Representative Hamiel leaving the Legislature leaving a District 20 seat open, Carson and Tona Rozum were unopposed for the June 8, 2010 Republican Primary; in the three-way November 2, 2010 General election Carson took the first seat with 5,363 votes (43.4%) and Rozum took the second seat ahead of Independent Becky Haslam.
