Mueller is a Republican.  Trump will be forced to either face indictment or they will allow him to complete his first term and quietly step down.  For the better of the party.  That is my prediction.  In the end, without an indictment, arraignment, and a trial, Trump gets away with alleged collusion and we never find out the truth.  It ends up protecting the Republican party.  That is my prediction.  I sincerely hope I am wrong and Trump ends up under the great scrutiny of a trial - no matter the outcome.