re: #81 jaunte
The constitutional grounds for impeaching POTUS are “high crimes and misdemeanors”.
What that means is entirely up to Congress. Apparently, some of the US founders thought impeachment would be such a threat to presidents that they would feel a need for Congressional authorization each time they used the White House plumbing facilities.
It hasn’t turned out that way, of course, and the US presidency is a very powerful office.
However, the House can impeach for any reason it sees fit on a majority vote, and the Senate can convict on a 2/3 vote.
The only reason the GOP house is talking about impeachment rather than doing it is that there aren’t 2/3 to convict in the Senate.