Michael Joseph Mansfield (March 16, 1903 – October 5, 2001) was an American politician and diplomat. A Democrat, he served as a U.S. representative (1943–1953) and a U.S. senator (1953–1977) from Montana.He was the longest-serving Senate majority leader and served from 1961 to 1977. During his tenure, he shepherded Great Society programs through the Senate.

Indiana 2: Won by Mike Pence. Indiana 7: Won by Brian Kerns. Missouri 2: Won by Todd Akin. Montana at-large: Won by Denny Rehberg. Nebraska 3: Won by Tom Osborne. New Jersey 7: Won by Mike Ferguson. Ohio 12: Won by Pat Tiberi. Pennsylvania 19: Won by Todd Russell Platts. South Carolina 1: Won by Henry E. Brown Jr. Texas 7: Won by John Culberson.