2004 When House District 7 incumbent Republican Representative Orville Smidt ran for South Dakota Senate, Tidemann and incumbent Republican Representative Sean O'Brien were unopposed for the June 1, 2004 Republican Primary[2] and won the four-way November 2, 2004 General election where Representative O'Brien took the first seat and Tidemann took the second seat with 4,696 votes (27.81%) ahead of Democratic nominees Roger Prunty and Rich Widman,[3] who had run for the seat in 2000.
2006 When House District 7 incumbent Republican Representative O'Brien left the Legislature and left a District 7 seat open, Tidemann and Carol Pitts were unopposed for the June 6, 2006 Republican Primary[4] and won the four-way November 7, 2006 General election where fellow Republican nominee Pitts took the first seat by 11 votes and Tidemann took the second seat with 4,585 votes (32.08%) ahead of Democratic nominees Robert Klein and Joshua Horton.[5]
2008 Tidemann and incumbent Republican Representative Pitts were again unopposed for the June 3, 2008 Republican Primary,[6] and won the four-way November 4, 2008 General election where Tidemann took the first seat with 5,428 votes (32.05%) and incumbent Representative Pitts took the second seat ahead of Democratic nominees Steve Binkley and Abigail Howell.[7]
2010 To challenge Senate District 7 incumbent Democratic Senator Pam Merchant, Tidemann was unopposed for the June 8, 2010 Republican Primary[8] and won the November 2, 2010 General election with 4,289 votes (54.15%) against Democratic Senator Merchant.[9]
State Senate
2012 Tidemann and Democratic former Senator Pam Merchant were both unopposed for their June 5, 2012 primaries,[10] setting up a rematch; Tidemann won the November 6, 2012 General election with 4,362 votes (53.52%) against Senator Merchant.[11]