Speculation and rumors do not raise the level of the conversation. Rod Rosenstein is very much a creature of the Swamp, and he sincerely believes it will protect him. As of the present time, he is entirely correct in that assumption. Unless there is sufficient evidence to be made public of either a dead girl or a live adolescent boy in his bed, not much of anything will touch him.
For sure his immediate boss, Jeff Sessions, is not making the right moves here. What pictures of obscene little secrets do the Swamp denizens have on Sessions?
Nobody just walks away.
Sessions is not in any danger. He isn't "part of the swamp". Sessions is playing his part to perfection. You'll see.