Seems to me his is saying he is recused. Its not his decision
But Sessions is saying two different things.
Back in January, Sessions said that he is required not to participate in cases where there is a conflict of interest.
But now recently, Sessions is saying that not participating in a case where there is a conflict of interest, is optional and the decision left up to the individual, in this case Rosenstein.
It's apparent to me, when it comes to recusals and draining the swamp, Sessions will always rationalize the easiest route.