Can he be impeached after he leaves office? I am not sure of the legality of that. Clearly I am not a lawyer.
I'm no expert, but I've been reading of that option.
It seems possible but unclear.
Can the House Impeach a Former President?
https://www.washingtonpost.com/politics/2019/12/06/can-former-presidents-be-impeached/
Excerpted (due to paywall).....
“You actually can impeach a former President.”
— Rep. Matt Gaetz (R-Fla.), in a Twitter post, Dec. 4
We’re venturing into the void, into what Donald Rumsfeld would call a “
known unknown.”
The Constitution gives Congress the power to impeach and remove federal officials, so what is Gaetz talking about when he says presidents may be impeached even after leaving office? Can Congress beat a dead horse?
This seemingly simple question is actually the subject of debate among legal scholars.
Some argue it’s impossible to impeach former officials. Some say it’s possible — if Congress wants to ban them from holding federal office again. One scholar said a definitive answer would come only after a court battle on these issues.
For now, no court appears to have ruled on this question, the text of the Constitution doesn’t spell out the answer, and past practice in Congress is an inconclusive guide. So we will withhold a rating for Gaetz’s claim and instead take the scenic route through this quagmire, laying out what several legal experts told us.
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Article II, Section 4 of the Constitution, says, “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.” Article I, Section 3, says, “Judgment in cases of impeachment shall not extend further than to removal from office, and disqualification to hold and enjoy any office of honor, trust or profit under the United States.”
That means an official found guilty at an impeachment trial faces two maximum penalties: getting fired, and getting banned from “any office of honor, trust or profit” in the U.S. government.