So, it just might be possible that someone is going to ask him this question. If it's in closed session, it might mean that proof of this already exists and is so damning as to be downright frightening to a great many in the Senate.
It is entirely possible that a great many in the Senate have been playing Cohen's game right alongside him.
I don't have the least bit of trouble imagining Mitch McConnell selling access to Trump.
The only people pushing the Athenian Straw Man Nonexistent Threat of Slippery Slope Windyfoggery (ASMNSSW) RE DEMOCRACY are people who have a misunderstanding/problem or hatred of democracy. (See AUTHORITARIANS)