No U.S. president has been convicted after impeachment and removed from office. While two presidents have been impeached by the House of Representatives—Andrew Johnson in 1868 and Bill Clinton in 1998—neither was convicted by the Senate, which is required for removal. Johnson fell one vote short of the two-thirds Senate majority needed for conviction on charges related to the Tenure of Office Act. Clinton was acquitted on both charges brought against him, with the perjury count receiving 45 guilty votes and the obstruction of justice count receiving 50 guilty votes, both well short of the 67 needed for conviction. Richard Nixon resigned in 1974 before he could be impeached, making removal moot. A president can only be removed from office through conviction on impeachment charges; no other mechanism in U.S. law provides for presidential removal based on misconduct while in office.