unlike the media I have never failed to get it right on Trump, so here's my read of what's happening. 

Sessions is a loyal and faithful supporter and I believe aware of the enormous blunder and disservice he did the President through re-cussing himself from the Russian investigation. He knows he will have to fall on his sword, in his words "when it's appropriate" 

Trump's legal team will present a case against Mueller and it will be handed over to Sessions. The AG will take back control from Rod Rosenstein and assert his constitutional authority and fire Mueller. Congress will go crazy and demand his resignation and Trump will oblige. It's over. 

The analysts, pundits and opinion makers say Mueller will never get fired, citing Nixon et al, but as usual they really don't know . Anyone trying to figure Trump  should get a copy of Gingrich's book Understanding Trump. The President is way tougher and smarter than most who have ever occupied the WH.