Question: Which Democratic Party politician from South Dakota was re-elected to the Senate in 1974 over a colonel in the United States Air Force who received the Medal of Honor for his actions in the Vietnam War?

full_context: Document 1: George McGovern: George Stanley McGovern (July 19, 1922 – October 21, 2012) was an American historian, author, U.S. Representative, U.S. Senator, and the Democratic Party presidential nominee in the 1972 presidential election.
Document 2: Leo K. Thorsness: Leo Keith Thorsness (February 14, 1932 – May 2, 2017) was a colonel in the United States Air Force who received the Medal of Honor for his actions in the Vietnam War. He was awarded the medal for an air engagement on April 19, 1967. He was shot down two weeks later and spent six years in captivity in North Vietnam as a prisoner of war. After his military service, Thorsness served one term in the Washington State Senate.
Document 3: Richard Secord: Major General Richard Vernon Secord, Retired (born July 6, 1932), is a United States Air Force officer with a notable career in covert operations. Early in his military service, he was a member of the first U. S. aviation detachment sent to the Vietnam War in August 1961, Operation Farm Gate. Secord left Vietnam in 1965 to attend Air Command and Staff College. Afterwards, he returned to Southeast Asia, being detailed to the Central Intelligence Agency for duty in the Secret War in Laos. While in Laos, he was responsible for several notable military actions. One was the Battle of Lima Site 85. Another was the only successful prisoner of war rescue of the Vietnam War. Both of these came about because of his responsibilities for overseeing the operations of the Royal Lao Air Force, Air America, and Raven FACs.
Document 4: Peter C. Lemon: Peter Charles Lemon (born June 5, 1950) is a former United States Army soldier and a recipient of the U.S. military's highest award, the Medal of Honor. He received the award for his actions on April 1, 1970, while serving in Tây Ninh Province during the Vietnam War. He dedicates the Medal of Honor to the three comrades he lost in the battle which he received the award for: Casey Waller, Nathan Mann and Brent Street. Lemon is the only Canadian-born U.S. citizen to be presented the medal for fighting in the Vietnam War. He is the eighth-youngest living Medal of Honor recipient.
Document 5: Electoral history of George McGovern: George McGovern, a Democratic Party politician from South Dakota, was first elected to the United States House of Representatives to represent South Dakota's 1st congressional district in 1956. He was re-elected in 1958, before making an unsuccessful run for the United States Senate in 1960 against Republican incumbent Karl Earl Mundt. After serving in the John F. Kennedy administration as director of the Food for Peace program, McGovern ran again for the Senate and narrowly prevailed over appointed Senator Joseph H. Bottum. In 1968, McGovern unsuccessfully sought the Democratic Party's presidential nomination at the Democratic National Convention and was re-elected to the Senate over former Governor of South Dakota Archie M. Gubbrud. In 1972, McGovern was successful in his campaign for the Democratic presidential nomination, but lost the election in a landslide to incumbent President Richard Nixon. McGovern was re-elected to the Senate in 1974 over Vietnam War veteran Leo K. Thorsness, but lost re-election in 1980 to then-U.S. Representative James Abdnor. McGovern made a final unsuccessful run for president in United States presidential election, 1984.
Document 6: Richard A. Stratton: Captain Richard Allen Stratton USN (born October 14, 1931) is a retired Naval Aviator (No. V-11444) and clinical social worker. He served as a Lieutenant Commander during the Vietnam War from 1966 to 1973. He was attached to the USS Ticonderoga (CVA-14)/Air Wing 19/Attack Squadron VA-192 flying 22 combat missions earning two Air Medals and the Combat Action Ribbon. After capture by the North Vietnamese in January 5, 1967, he served with the Fourth Allied POW Wing, Hanoi, DRVN. He earned the Silver Star for his valor and leadership while a prisoner of war. His post service career was as a clinical social worker licensed to practice in Rhode Island and Florida and a national certified addiction counselor, Level I. He served as the Chairman, Department of Veterans Affairs Advisory Committee on Prisoners of War from 1989 to 1995.
Document 7: Eugene McCarthy: Eugene Joseph McCarthy (March 29, 1916December 10, 2005) was an American politician, poet, and a long-time Congressman from Minnesota. He served in the United States House of Representatives from 1949 to 1959 and the United States Senate from 1959 to 1971. McCarthy sought the Democratic nomination in the 1968 presidential election, challenging incumbent Lyndon B. Johnson on an anti-Vietnam War platform. McCarthy would unsuccessfully seek the presidency five times altogether.
Document 8: Thomas Eagleton: Thomas Francis "Tom" Eagleton (September 4, 1929 – March 4, 2007) was a United States Senator from Missouri, serving from 1968 to 1987. He is best remembered for briefly being the Democratic vice presidential nominee under George McGovern in 1972. He suffered from bouts of depression throughout his life, resulting in several hospitalizations, which were kept secret from the public. When they were revealed it humiliated the McGovern campaign and Eagleton was forced to quit the race. He later became adjunct professor of public affairs at Washington University in St. Louis.
Document 9: Leland T. Kennedy: Leland Thornton "Lee" Kennedy (January 1, 1934 – December 28, 2003) was a career officer and pilot in the United States Air Force, and a highly decorated veteran of the Vietnam War. Kennedy flew the EC-121 Warning Star during the Cuban Missile Crisis, and later served two tours of duty in Vietnam.
Document 10: James Stockdale: James Bond Stockdale (December 23, 1923July 5, 2005) was a United States Navy vice admiral and aviator awarded the Medal of Honor in the Vietnam War, during which he was an American prisoner of war for over seven years.
Document 11: Eleanor McGovern: Eleanor Fay Stegeberg McGovern (November 25, 1921 – January 25, 2007) was the wife of George McGovern, who served as a U.S. Senator from South Dakota from 1963–1981, and was the Democratic presidential nominee in 1972.
Document 12: United States Senate election in Montana, 1960: The 1960 United States Senate election in Montana took place on November 8, 1960. Incumbent United States Senator James E. Murray, who was first elected to the Senate in a special election in 1934 and was re-elected in 1936, 1942, and 1948, and 1954, declined to seek re-election, creating an open seat. United States Congressman Lee Metcalf won out in a crowded Democratic primary and faced off against former United States Congressman Orvin B. Fjare, who won in a similarly-crowded Republican primary. Following a close general election, Metcalf narrowly defeated Fjare to win his first term in the Senate.
Document 13: Bud Day: George Everette "Bud" Day (24 February 1925 – 27 July 2013) was a United States Air Force colonel and pilot who served during World War II, the Korean War, and the Vietnam War, including five years and seven months as a prisoner of war in North Vietnam. Day was a recipient of the Medal of Honor and the Air Force Cross. s of 2016 , he is the only person to be awarded both medals.
Document 14: United States presidential election, 1972: The United States presidential election of 1972, the 47th quadrennial presidential election was held on Tuesday, November 7, 1972. The Democratic Party’s nomination was eventually won by Senator George McGovern of South Dakota, who ran an anti-war campaign against Republican incumbent President Richard Nixon, but was handicapped by his outsider status, limited support from his own party, the perception of many voters that he was a left-wing extremist and the scandal that resulted from the withdrawal of vice-presidential nominee Thomas Eagleton.
Document 15: United States Senate election in Montana, 1976: The 1976 United States Senate election in Montana took place on November 2, 1976. Rather than seek a fifth term, incumbent United States Senator Mike Mansfield, a Democrat, opted to retire, creating an open seat. United States Congressman John Melcher, who had represented Montana's 2nd congressional district from 1969 to 1977, won the Democratic nomination and defeated Stanley C. Burger, the Republican nominee, by a wide margin in the general election.
ground_truth: George McGovern