He always has been. He's an idiot at best, good only for digging up information.
Not sure what reason you think there is to replace RR now. He's no long AAG over RM. Whitaker took over. Maybe there's some peripheral duties he has for transitioning the role, but he was assigned to the MS-13 task force right before Sessions stepped down.
That's absolutely what it was, aka, bait. Now everybody is talking about how bad it is to use personal devices to conduct gov't business. Of course, that will force them to admit it's not illegal as long as the email is archived for FOIA purposes and does not contain anything classified. Neither condition was met by HRC.
Maybe. Dunno. Not even sure what happened to Sessions at this point. There was no official statement that he had been fired and the "resignation" letter was the undated one from over a year ago.