More proof you don't understand much of what goes on about you. Rosenstein is the person Mueller must go to in order to expand the investigation. To do so otherwise is a violation of his charter. Sessions will havenothing to do with it.
No, it is you who are a bit dense.....I do not expect for Session to be AG for much longer......When the orange buffoon picks some lackey BYPASSING Rosenstein, then Mueller would have to go to the Trump lackey..
besides, there is currently NO reason for Mueller to go to anyone to continue what heis going..PERIOD.