No evidence whatsoever.
No concern for what it does to the girl (why would he care if she is a Trump supporter, right? Many of these radicals cheer for the assassins who try to kill him already).
The liberal MSM and Dems all over the place are jumping on board.

It's Liberalism Rule #1: Accuse others of that which you yourself are/do............this guy knows that if it were him, he'd go for the affair, so naturally, he assumes that Trump must do the same thing.

What are the odds that we will find such a thing out about this GA Dem someday?
If you want to know what a liberal is up to, listen to what he accuses others of doing.