How many presidents have been impeached?
Andrew Johnson was impeached in 1868 for violating the Tenure of
Bill Clinton was impeached in 1998 for perjury and obstruction
Note that Impeachment does not mean removal from office, it
means that he is being investigated on suspicion of wrongdoing that
may result in him being removed from office. In both of the above
cases the President remained in office.
Richard Nixon was not impeached, he resigned before the
impeachment proceedings being considered agaisnt him could