The guys name is Jesse Panuiccio he was put in place as associate AG earlier this year by Trump after terminating a woman that held that position!!! He is 37 years old and it is believed that Trump made this move so this person could step in when RR was let go, and the position could just be a promotion with no appointment necessary no confirmation necessary!!! The ground work in place already for draining the swamp!!! As far as Sessions is concerned if we gain seats in the senate confirmation for AG shouldn’t be a problem!!!
According to Wikipedia, Rachel Brand quit because she did not want to deal with the SC being dropped in her lap. She either knew what was going on or couldn’t stand RR.
I think you might be mistaken about no Senate confirmation needed.
I believe there is a 210 day limit for a “promoted” person to hold a job that requires confirmation.
I don't know what happens after 210 days.