Yeah, uhm...if it gets out that Russia basically bought him, wouldn't that mean that Trump, at the very least, would be guilty of actual, literal treason? If he is, he will certainly be remembered. Right alongside the likes of Nixon, except he'd be the first President to ever be both impeached and subsequently put to death (I believe treason still carries the death penalty) for treason.
That's not counting anyone who might've colluded with the whole ordeal.