Sessions failure is NOT his recusal. His failure, and it is a big one, was in not being honest with Trump before accepting the nomination as AG. He sandbagged the President by not telling him what he would do if confirmed, and that caused his loss of trust. In essence, this entire snipe-hunt with Mueller was created by Sessions doing what he did and it could all have been avoided  by him being up front from the outset. Were I to withhold critical information in a job interview I would expect to lose my boss'es confidence and be fired. That is the position Sessions finds himself in and it is self-inflicted. I like Sessions, but he made a big mistake and it's costing his boss.