I just looked up the Arizona Election Code and procedures manual.
Since this is a primary, it looks like the best of all worlds would be for the Governor to appoint the winner to fill McCain's term. This has the advantage of ensuring that person at least two years in the Senate instead of taking the gamble of the general election. Then, with the vacancy in the general election caused by loss of the primary winner, the party may select a replacement candidate. This could easily be the runner-up in the primary.
-PJ
Not gonna happen.
1) McSally will win by 20. Ducey no fan of Ward.
2) It would be a nuke bomb to name primary loser (Ward) to a seat then have the winner lose in the general and not have a seat. Ducey isn’t stupid.
3) I’m voting Ward on Tues, but it would be an insult to the voters to put in place someone who was rejected by the majority GOP for the nomination. Just won’t fly.