"Republican lawmakers have a warning for President Donald Trump: Don’t mess with Robert Mueller.
Some Trump allies have begun agitating for Trump to fire the man appointed just last month as a special counsel to oversee the Justice Department’s investigation of Russian meddling in the 2016 presidential election."
Republicans to Trump: Hands off Mueller - POLITICO
As and addendum, if you recall with Watergate, all WH aides spent time in jail....I am betting that now we know Trump is under criminal investigation, lawyers are being hired.