I agree but a part of me thinks R man made a deal or he was acting like a double agent.
I think RR just went in the direction of the political winds. As long as it looked like HRC would win he went that way. Once Trump won and it was clear to insiders that the entire collusion narrative was predicated on lies and illegal intel ops he went that way.
The Congress can bluster a lot, but they have ceded to the office of POTUS with great power.