Neither of those are ‘proof’ for what you claimed.
Did you read the BuzzFeed dossier?
Who knows, probably not but it’s certainly not impossible.
This is Putin we’re talking about.
UN Charter pretty sure does, and that’s just one example
You have no evidence to back up this claim.
“Treason, Bribery, or other high Crimes and Misdemeanors” is pretty broad. If Bill Clinton can get close to impeachment for allegedly lying about adultery and a claim of sexual assault, some of the allegations against Trump could, if true, lead to impeachment.