"High crimes and misdemeanors" is a term of art that refers to acts committed by a public official which, while not necessarily a crime in themselves, are a violation of public trust.

For example, a president that accepted a foreign title of nobility without Congressional consent would have committed a high crime, but they couldn't be hauled into a criminal court for it.

All fair points that still ignore the guy who tried to overthrow the country where absolutely nothing was done about him, to hold him accountable.

If the feds are saying only they can protect the country from all enemies orange and domestic, there’s about 80 million active voters who might, uh, decidedly disagree. As opposed to some other adverb.