Well DUH....
We know why Mueller was put there, as the Democrats' Ace in the Hole to pull the trigger when and if Trump got too close to disrupting their corruption gravy train.
Most of us with brains understood Mueller's job was to find something, ANYTHING that could be used to pry Trump from office and set the precedent that the Oligarchy in concert with the media could take out and replace whomever they want to.