This the investigation without announced crime. Pure fishing expedition. I say just pardon everyone, including himself, of anything related, and get this over with.
That said, Mueller is compromised, knows it, and should recuse himself or be fired.
Can Rosenstein recuse Mueller?
Mueller should be hounded by the press.
Have Rosenstein fire Mueller on the basis of compromised partisanship. Let the outrage build over that. Then Trump fires Rosenstein on the basis of his incompetence in handling the situation.