The Absence Of Any Apparent Crime.

Would be the main one.

https://us.cnn.com/2021/01/19/opinions/trump-cant-legally-pardon-himself-opinion-adler/index.html

I hate to cause emotional distress. By getting all technical in a world of delusion.

The House voting to send articles of impeachment to the Senate. Is not the same as a President being impeached.

It's obviously a unique process.

However it's similar to the House acting as a Prosecutor. Empanelling the Senate to act as a Grand Jury.

A Grand Jury handing down an Indictment is, if course, very different to someone being convicted of a crime.

So, technically, The US has never impeached a President. Despite four attempts.

It says a lot about their respect for democracy.

That 50% of those attempts have been the Democrats trying to overthrow President Trump.