"The last thing we need is an angry, vengeful Trump left in office feeling isolated from both his party and his administration. That could be catastrophic."
Yet that is exactly what we have now!
I did not intend to offer the information about the MH field convinced of DJT's level of dangerousness as a way to move the VP on starting impeachment of  the POTUS - but recall that it wasn't Bill Clinton's VP (Gore) that started the impeachment proceedings, either.  No - the House can do so on it's own.  And there is a building resentment and even hatred of Trump throughout both houses that continues to grow with every attack on members of Congress by him.  So your interpretation of the entire scope of impeachment seems to be lacking a bit, and I think you may not be fully aware of what we actually have sitting in the Oval Office right now.  I admire your oveall thoughtfulness in this important discussion!