Two presidents have been impeached : Richard Nixon in 1868 and Bill Clinton in 1998 . One president has resigned from office : Andrew Johnson , on August 8 , 1974 . $ 90,000 - Amount of `` cold hard cash '' found in the freezer of Rep. William Jefferson , D-Louisiana , after an FBI search that led to convictions in 2009 on 11 criminal counts , including bribery , money laundering and wire fraud . Four members of Congress have been expelled for unethical conduct since the Civil War . Two governors of Illinois have been sentenced to prison since 1973 .
Two presidents have been impeached : Richard Nixon in 1868 and Bill Clinton in 1998 . One president has resigned from office : Andrew Johnson , on August 8 , 1974 . Four members of Congress have been expelled for unethical conduct since the Civil War . Two governors of Illinois have been sentenced to prison since 1973 .