History of the United States (1964–1980)
The growing Watergate scandal was a major disaster for Nixon, eroding his political support in public opinion and in Washington. However he did manage to secure large-scale funding for South Vietnam, much of which was wasted. The United States withdrew its troops from Vietnam before the Paris Peace Accords in 1973. However, Watergate resulted in significant Democrat gains in the 1974 midterm elections and when the new 94th Congress convened the following January, it immediately voted to terminate all aid to South Vietnam in addition to passing a bill forbidding all further US military intervention in Southeast Asia. President Ford was against this, but as Congress had a veto-proof majority, he was forced to accept. South Vietnam rapidly collapsed as the North invaded it in force, and Saigon fell to the NVA on April 30, 1975. Later nearly one million Vietnamese managed to flee to the U.S. as refugees. The impact on the U.S. was muted, with few political recriminations, but it did leave a "Vietnam Syndrome" that cautioned against further military interventions anywhere else. Nixon (and his next two successors Ford and Carter) had dropped the containment policy and were not willing to intervene anywhere.
Presidency of John F. Kennedy
By November 1963, there were 16,000 American military personnel in South Vietnam, up from Eisenhower's 900 advisors. In the aftermath of the aborted coup in September 1963, the Kennedy administration reevaluated its policies in South Vietnam. Kennedy rejected both the full-scale deployment of ground soldiers, but also rejected the total withdrawal of U.S. forces from the country. Historians disagree on whether the U.S. military presence in Vietnam would have escalated had Kennedy survived and been re-elected in 1964. Fueling the debate are statements made by Secretary of Defense McNamara in the film "The Fog of War" that Kennedy was strongly considering pulling out of Vietnam after the 1964 election. The film also contains a tape recording of Lyndon Johnson stating that Kennedy was planning to withdraw, a position that Johnson disagreed with. Kennedy had signed National Security Action Memorandum (NSAM) 263, dated October 11, which ordered the withdrawal of 1,000 military personnel by the end of the year. Such an action would have been a policy reversal, but Kennedy was moving in a less hawkish direction since his acclaimed speech about world peace at American University on June 10, 1963.