And if they don’t?
Oh they will, at least the Mormons. The LDS church has already said to in essence with a letter telling them to vote for the candidate who reflects Mormon gospel principles (ie the Mormon).
However, the exmormons I know in Utah are pretty solidly Trump with a few heading to Hillary and the nevermormons are equally divided except in Ogden which is more pro-Trump (Hill AFB)
Have ya heard about that big DATA CENTER in Utah??