These guys who are announcing their retirement are doing so in order to be able to openly sabotage Trump. Tax reform is dead, so is a S.Ct. Judge. Flake, Collins, Corker, McCain and whats her face in Alaska (yes, I know its Murkowski but I like whats her face better) are all in it now to bring down the GOP’s majorities. If they can’t win the game, then they will make sure nobody can play it.
I agree - this is the final spiteful move on their part.