Sessions allowed himself to be boxed in by the Mueller team by his recusal.  Sundance has also discovered that the DOJ players were not keeping Sessions in the loop on important matters of national security. He was rendered ineffective.  What Sessions did do however is launch separate investigations into leaks.  Without that investigation we would NOT know about the Carter Page FISA leak to the NYT, WAPO and others.    As for the Senate race and the public bickering with POTUS, I think that was for show, a headfake if you will.  Sessions will be called to testify at some point and he will support POTUS.