Final answer:
Four presidents have faced impeachment proceedings in the House, but none have been removed from office. They include Andrew Johnson, Richard Nixon, Bill Clinton, and Donald Trump.
Step-by-step explanation:
Four presidents have faced impeachment proceedings in the House, but none has been both impeached by the House and removed by the Senate. President Andrew Johnson was impeached over policy disagreements with Congress on the Reconstruction of the South after the Civil War. President Richard Nixon faced impeachment for his cover-up of the Watergate scandal, but he resigned before he could be impeached by the House. President Bill Clinton was impeached by the House but was found not guilty by the Senate. Lastly, President Donald Trump was impeached twice by the House, but he was acquitted by the Senate on both occasions and not removed from office.