Richard Nixon's tenure as the 37th president of the United States began with his first inauguration on January 20, 1969, and ended when he resigned on August 9, 1974, in the face of almost certain impeachment and removal from office, the only U.S. president ever to do so. He was succeeded by Gerald Ford, whom he had appointed vice president after Spiro Agnew became embroiled in a separate corruption scandal and was forced to resign. Nixon, a prominent member of the Republican Party from California who previously served as vice president for two terms under president Dwight D. Eisenhower from 1953 to 1961, took office following his narrow victory over Democratic incumbent vice president Hubert Humphrey and American Independent Party nominee George Wallace in the 1968 presidential election. Four years later, in the 1972 presidential election, he defeated Democratic nominee George McGovern, to win re-election in a landslide. Although he had built his reputation as a very active Republican campaigner, Nixon downplayed partisanship in his 1972 landslide re-election.
Nixon's primary focus while in office was on foreign affairs. He focused on détente with the People's Republic of China and the Soviet Union, easing Cold War tensions with both countries. As part of this policy, Nixon signed the Anti-Ballistic Missile Treaty and SALT I, two landmark arms control treaties with the Soviet Union. Nixon promulgated the Nixon Doctrine, which called for indirect assistance by the United States rather than direct U.S. commitments as seen in the ongoing Vietnam War. After extensive negotiations with North Vietnam, Nixon withdrew the last U.S. soldiers from South Vietnam in 1973, ending the military draft that same year. To prevent the possibility of further U.S. intervention in Vietnam, Congress passed the War Powers Resolution over Nixon's veto.