It is always a crisis in Washington. Trump is going to fire him and just weather the storm. He never released his tax returns and was hounded about that for months. Trump doesn't want investigators going into his past business deals. He probably has some shady tax or business deals that he doesn't want the public to see. A LOT of people will savage him when he fires Mueller but that is par for the course in DC. Half of America already thinks he is guilty of some unnamed crime.