Marion Michael Rounds is an American businessman and politician serving as the junior United States senator from South Dakota since 2015. A member of the Republican Party, he served as the 31st governor of South Dakota from 2003 to 2011.
Timothy Peter Johnson is a retired American lawyer and politician who served as a United States senator from South Dakota from 1997 to 2015. A member of the Democratic Party, he served as the United States representative for South Dakota's at-large congressional district from 1987 to 1997 and in the state legislature from 1979 to 1987. He is the last Democrat to hold statewide and/or congressional office in South Dakota. He and Stephanie Herseth are also the last Democrats to win a statewide and/or federal election in South Dakota.
Sen. Johnson (second from right) answers questions after he helped prevent the closure of Ellsworth Air Force Base in South Dakota. Left to right: Governor M. Michael Rounds, U.S. Rep. Stephanie Herseth, Johnson and U.S. Senator John Thune.