The House initiated an impeachment process against Nixon in February 1974, authorizing the Judiciary Committee to investigate whether grounds existed to impeach him of high crimes and misdemeanors. The charges mostly related to Watergate — shorthand for the 1972 break-in at the Democratic National Committee headquarters and the Nixon administration's attempts to cover up its involvement.
In July 1974, the Judiciary Committee approved three articles of impeachment against Nixon — for obstruction of justice, abuse of power and contempt of Congress.
Before the full House could vote on the articles of impeachment, a previously undisclosed audio tape was released that made clear Nixon had a role in the cover-up. He resigned from office on Aug. 9, 1974.