House: 1959-1964

Iowa Senate: 2011-2014 Assistant Minority Leader, Iowa Senate: 2011-2014 U.S. Senate: 2015-2027

House: 1937-1940

House: 2019-2025

House: 1971-1982

House: 2013-2017

House: 1969-1970

House: 2019-2023 Senate: 2023-2027 Senate Assistant Minority Leader: 2023-2027

House: 1964-1968, 1981-2000 Senate: 1969-1978

Senate: 1995-2002




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