It's been explained numerous times on this board how Trump has been hamstrung in his efforts to clean out the DOJ, and what the obstacles are in firing Rosenstein and Sessions.
I'm not sure how you've missed that.
It’s not been a priority to me. I watch this whole thing as though it was a movie, not real life. I check out of the parts that don’t interest me. But I think he could fire sessions if he really wanted to.