Under coercion from the U.S. Supreme Court, President Richard M. Nixon releases subpoenaed White House recordings--suspected to prove his guilt in the Watergate cover-up--to special prosecutor Leon Jaworski. The same day, the House Judiciary Committee voted a third article of impeachment against the president: contempt of Congress in hindering the impeachment process. The previous two impeachment articles voted against Nixon by the committee were obstruction of justice and abuse of presidential powers.
On June 17, 1972, five men, including a salaried security coordinator for President Nixon's reelection committee, were arrested for breaking into and illegally wiretapping the Democratic National Committee headquarters in Washington, D.C.'s Watergate complex. Soon after, two other former White House aides were implicated in the break-in, but the Nixon administration denied any involvement. Later that year, reporters Carl Bernstein and Bob Woodward of The Washington Post discovered a higher-echelon conspiracy surrounding the incident, and a political scandal of unprecedented magnitude erupted.
On May 17, 1973, the Senate Select Committee on Presidential Campaign Activities, headed by Senator Sam Ervin of North Carolina, began televised proceedings on the rapidly escalating Watergate affair. One week later, Harvard Law professor Archibald Cox was sworn in as special Watergate prosecutor. During the Senate hearings, former White House legal counsel John Dean testified that the Watergate break-in had been approved by former Attorney General John Mitchell, with the knowledge of White House advisers John Ehrlichman and H.R. Haldeman, and that President Nixon had been aware of the cover-up. Meanwhile, Watergate prosecutor Cox and his staff began to uncover widespread evidence of political espionage by the Nixon re-election committee, illegal wiretapping of thousands of citizens by the administration, and contributions to the Republican Party in return for political favors.
In July, the existence of what were to be called the Watergate tapes--official recordings of White House conversations between Nixon and his staff--was revealed during the Senate hearings. Cox subpoenaed these tapes, and after three months of delay President Nixon agreed to send summaries of the recordings. Cox rejected the summaries, and Nixon fired him. His successor as special prosecutor, Leon Jaworski, leveled indictments against several high-ranking administration officials, including Mitchell and Dean, who were duly convicted.
Public confidence in the president rapidly waned, and by the end of July 1974 the House Judiciary Committee had adopted three articles of impeachment against President Nixon. On July 30, under coercion from the Supreme Court, Nixon finally released the Watergate tapes. On August 5, transcripts of the recordings were released, including a segment in which the president was heard instructing Haldeman to order the FBI to halt the Watergate investigation. Four days later, Nixon became the first president in U.S. history to resign. On September 8, his successor, President Gerald Ford, pardoned him from any criminal charges.