The press will throw him a party.
It sure has been.
Here are the actual requirements for firing Mueller. The pertinent question is "conflict of interest." I doubt that exists. There is an ethical catchall, but "ethics" is legal code for "backstabbing weasel."
28 CFR 600.7 - Special Counsel Conduct and accountability(c) The Special Counsel and staff shall be subject to disciplinary action for misconduct and breach of ethical duties under the same standards and to the same extent as are other employees of the Department of Justice. Inquiries into such matters shall be handled through the appropriate office of the Department upon the approval of the Attorney General.
(d) The Special Counsel may be disciplined or removed from office only by the personal action of the Attorney General. The Attorney General may remove a Special Counsel for misconduct, dereliction of duty, incapacity, conflict of interest, or for other good cause, including violation of Departmental policies. The Attorney General shall inform the Special Counsel in writing of the specific reason for his or her removal.