
Originally Posted by
FriscoDawg
“The President, Vice President and all Civil Officers of the United States, shall be removed from Office on Impeachment for, and Conviction of, Treason, Bribery, or other high Crimes and Misdemeanors.”
— U.S. Constitution, Article II, section 4
My read of the Constitution says yes. No House member has ever been impeached, and the only member of the Senate impeached had charges dismissed since he had already been expelled from the Senate.
Expulsion (or otherwise no longer holding office) eliminates the need for (or the legitimacy of) impeachment.