Congress can't shut the Mueller thing down anymore than they can pass a law preventing Trump from firing Mueller.
They have constitutional oversight responsibilities but they don't control the Executive Branch.
Trump can fire Mueller and stick a big finger in everyone's face and tell them to go ef themselves.
“Trump can fire Mueller and stick a big finger in everyone’s face and tell them to go ef themselves.”
Exactly!
And if they have a problem with it, President Trump can just jerk his thumb over his shoulder at the millions of us who have blood in our eye, and would like nothing better than to hoist the black flag over the Swamp...