Im not sure what Sessions did was a betrayal.
The whole lock her up chant, followed by a whole list of other Obama officials that should be indicted and locked up - seemed at first to be the obvious thing that should happen, and obviously Trumps AG should do it.
Otherwise, you have a two-tiered justice system.
But four years later, with nothing having happened even though Sessions is long gone, I believe it is more a case of poorly managed expectations.
Donald Trump was never going to try and lock them up - he took the pulse and decided he didnt have anywhere near the political clout to pull off Saturday Night Massacre times infinity. As it is, by merely firing Comey and a few others - he got himself impeached! Thats what he is up against.
Who knows, maybe in a second term hell be in a better position - but to blame Jeff Sessions for not locking them up and for the whole Mueller debacle - seems like a yuge stretch.
I was ready to be proven wrong when Barr became AG, but he hasnt made a dent either. Theres got to be more to this than who happens to be AG.
From what everyone has told me, including Bannon, though, Sessions totally betrayed Trump by not even talking to him about the recusal. he blindsided him, and the worst part was he put Rat Rosenstein in charge of Mulehead, and RR expanded the investigation to get Trump.