Of course not, as the FBI has clearly said. If there had been actual crimes, Flynn would not have been charged with a a Scooter Libby. Impeachment is a left-wing fantasy, nothing more.
Neither a Harvard prof nor FReepers know what a 33-year intelligence professional knows and what his credibility will turn out to be. Things are not always the way they may seem.
IOW, be careful what you say impugning his character, because he may have testimony regarding the real criminals.