It's never going to be Gowdy. Gowdy's said it a zillion times. He won't work in DC. He wants to PROSECUTE. And when those indictments are unsealed, he'll have a boatload of prosecutions to do. I think he's the one to prosecute Hussein and HRC.
So, like in a play (or a movie), when a person finishes his part, he leaves the stage. Sessions has finished his part and now it's time for his exit to leave room for the next player to play his role. Enter Matt Whitaker.