Impeachment only removes him from office. Unclear what would happen if he then ordered the FBI and military to arrest and imprison all Senators and just stayed put. Guess it would be an "official act."
What if he’s impeached for something by the House and starts ordering Secret Service snipers (whom he preemptively pardons) to assassinate Senators who say they’ll vote against him at the Senate trial? What does anyone do about that?
We already know what “official acts “are - any act taken by a Republican, and I mean ANY. Unofficial acts are pretty much any action taken by Democrats. It’s Bush vs. Gore all the way down and yet one more reminder we should have become ungovernable then.