Interviewing Trump is the natural end of his investigation, just as interviewing Hillary was for the allegations relating to her activities.
Mueller won't be able to milk this much longer.
I wonder what Mueller's name will mean by then.
The reason RM is SC is that he doesn’t HAVE to attend meetings to review evidence against the deep state or how to derail CINC’s getting to the bottom of it: it’s all in his head.
Probably why CINC hired him: he said ‘OK, deep state, I’ll even hire your Head Vampire and STILL beat you, just watch.’