The facts are the neither the Republican nor Democrat "establishment" wanted Trump as President, but against the odds that is what happened.

Mueller's role is simply to prevent Trump from deviating too far from the Deep State script. If and when it comes time to dump Trump, they will find something.

After it was revealed that the Deputy Director of the FBI was the Deep Throat that brought down Nixon, people are much wiser to the games being played. Mueller's job is to find Trump's Watergate Hotel and keep it in his hip pocket until needed. They will also need to find a Gerald Ford to replace Spiro Agnew (Mike Pence).