Donald Trump was impeached twice; once in 2019 for of abuse of power and obstruction of Congress, and in 2021 for incitement of insurrection. Bill Clinton was impeached in 1998 on charges of perjury and obstruction of justice. Impeachment proceedings began on Richard Nixon in 1974 for obstruction of justice, abuse of power, and contempt of Congress, but the president announced his resignation before the House could vote. Andrew Johnson was impeached in 1868, primarily for violating the Tenure of Office Act of 1867,