Good. Hopefully good Flake goes bye bye in a primary.
The thing is that a Ward/Sinema race in 2018 would be a very likely Dem pickup if Trump is unpopular.
If it's only Ward challenging him then I won't back either and support whichever crappy candidate wins the R nom in the general. If it's a real challenge from a sane person, I'll back that person
Jan Brewer is the best chance of holding the seat after Flake, followed by Ben Quayle. Anyone else would certainly lose to Sinema or Kirkpatrick.
I'm a bit surprised you dislike Flake. Is it solely because of him being NeverTrump and too pro-Cuba for you?