To impeach a president, the House of Representatives must come up with an accusation against the president.
The trial is then held by the Supreme Court with the Senate as a jury.
So, both the Judicial and the Legislative branch participate in impeaching a president.
The "witch" branch of government can only be impeached by an ordained "witch-hunter" or exorcist.
the executive branch can be impeached
None
Andrew Johnson and Clinton.
No US presidents have been impeached and convicted and so removed from office.
Two presidents were impeached: Andrew Johnson and William Clinton (Bill Clinton).
Andrew Johnson, and Bill Clinton
Two
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Two U.S. Presidents have been impeached, Andrew Johnson, and Bill Clinton. Johnson and Clinton were acquitted at trial. From Wikipedia.
Andrew Johnson and Bill Clinton were impeached.
Andrew JohnsonBill Clinton(Richard Nixon resigned before he could be impeached)