Republican campaign buttons for Richard M. Nixon's 1972 presidential campaign.

Richard Milhous Nixon (1913 - 1994) 37th President of the USA who resigned in 1974 under threat of impeachment after the Watergate scandal.

American president Gerald Ford (far right) waving goodbye as former President Richard Nixon's helicopter takes off from the White House on the day he resigned his presidency, Washington, D.C. Standing with Ford are his wife Betty...Plus

American politician Richard Nixon (1913 - 1994) with his family after his resignation as President, 9th August 1974. From left, Tricia Nixon, her husband Edward Cox, and former First Lady Pat Nixon (1912 - 1993).

Pres. Richard Nixon raising hands w. trademark V signs in doorway of helicopter after leaving White House following his resignation over the Watergate scandal, 9th August 1974.

Richard Nixon (1913 - 1994) gives the thumbs up after his resignation as 37th President of the United States. His son-in-law David Eisenhower is with him as he says goodbye to his staff at the White House, Washington DC.

American president Richard Nixon (1913 - 1994) announces his resignation on national television, following the Watergate scandal.

Video grab of President Richard Nixon announcing his resignation in speech from the Oval Office.

U.S. President Richard M. Nixon sits at a desk, holding papers, as he announces his resignation on television, Washington, D.C.