Mueller isn't going anywhere on his own. He, Rosenstein and Sessions are the insurance policy as long as they are in place.
Nunes and friends in Congress are building support for a contempt vote and maybe an impeachment vote in the House. The Senate would never remove Rosenstein, but at that point Trump will have enough congressional support to start jettisoning the Deep State triumvirate that forms the insurance policy.
That is my hope.
I do not have high confidence in any scenario, but this one seems practicable.
I cannot understand how the Sessions Sycophants can continue to defend an AG that has allowed Rosenstein to usurp his authority beyond the Russian Collusion investigation, and who has refused to honor Constitutional oversight of the DOJ. Those are the deeds of an Honorable Rule-of-Law official?