In principle, the SC is under the thumb of whoever appointed SC, usually AG, in this case DAG becuse sessions is properly recused from "investigating himself." (he was on the campaign that is being investigated).
Morrison v. Olsen if you want to dig into the details, but it's a waste of your time. Levin is just keeping things interesting for his audience, which is getting impatient.
Thank you. Just puts the weight of responsibility for all of it on RR, IMO.