Which they can avoid by resigning. So the worst penalty for almost any crime is they might have to step down,
https://en.wikipedia.org/wiki/First_impeachment_trial_of_Don...
https://en.wikipedia.org/wiki/Second_impeachment_trial_of_Do...
> Seven Republican senators joined all Democratic and independent senators in voting to convict Trump, the largest bipartisan vote for an impeachment conviction of a U.S. president or former U.S. president. After the vote on the acquittal, Mitch McConnell said, "There's no question that President Trump is practically and morally responsible for provoking the events of the day." but he voted against conviction due to his interpretation of the United States Constitution.
It's worth noting that the Supreme Court ruling here probably disagrees with McConnell's interpretation of the Constitution in a way that should have changed his vote.
To show what a different world it was then, the chair of the House committee, a Democrat, called his wife to tell her "we voted to impeach", *and then started crying" because it was horrible that it had come to that, and that the president had done such things. Today they would have been cheering.