Thurstonian:  I do agree with you that Trump will "make a run at" Mueller.  The Mueller investigation has Trump very, very nervous.  I agree he'll likely dump Sessions and find someone who will be willing to fire Mueller.  Trump is no history buff and likely thinks the Saturday Night Massacre refers to a bad loss by the NY Yankees.  I would suggest firing Mueller would possibly lead to impeachment....at least I would hope so.  

Supreme Potentante?  Clearly Trump already feels his position as President comprises  his having absolute powers.  To him it seems "checks and balances" is an accounting term.  With Trump as President each day is a new adventure....none of them very pleasant.  Instead of "growing into the Presidency", Trump is bringing the Office down to his level.  That's very sad for our country.  Gary crum