Those in Congress are just as complicit . . . or hiding under their desk.
However, they're not so stupid that they can't understand what's going on with Trump and Russia. I suspect some of them are keeping their powder dry because they want his job and want to inherit his base of gullible idiots. Tom Cotton, in particular, come to mind but there are others who would settle for the VP spot as a stepping stone.
I mention Tom Cotton first because he's already sold out America once when he tried to sabotage the Iranian Accords. He collected a million bucks from Israel for that one. That's when Jeb Bush was the most likely candidate to win the Republican nomination. Tom Cotton was promised the VP spot as another incentive.
If the winds are blowing right I suspect Cotton to jump into the 2020 race with a huge amount of dirty foreign money laundered through supporters of Israel. Their goal is for America to fight a proxy war for them.