"You have a group who cares more about politics than the church, those Mormons tend to be Trump supporters," Miles said. "For those religion-first Mormons, they won't support Trump. They'll say he had too many divorces, and they don't see him as a strong moral leader."
Don Peay is a Mormon who supports Trump, and he calls on fellow faithful to look past the "superficial" to see a tough candidate who will protect them.
One core issue for many Latter-day Saints, according to Miles, is Trump's call to block Muslims from entering the United States as a safeguard against terrorism. That stance stirs fear among members of a faith that has its own history of persecution. And, in defense of this policy, a Trump spokeswoman mistakenly referred to the feds shutting down "Mormon churches," when she actually meant the Fundamentalist Church of Jesus Christ of Latter-Day Saints, a breakaway sect that practices polygamy.
In December, the Salt Lake City-based Church of Jesus Christ of Latter-day Saints issued a statement in response to Trump's position highlighting a quote from Mormon founder Joseph Smith defending the religious rights of many faiths.
That may explain why Texas Sen. Ted Cruz walloped Trump in the heavily Mormon areas in southern Idaho en route to a 17 percentage point win in the state. Idaho, the state with the second most LDS residents, was Trump's only loss among the four states holding presidential contests last Tuesday. Trump had an even worse showing in Wyoming, which has the third-highest Mormon population. He got only 7 percent of Saturday's caucus vote, while Cruz amassed 66 percent.
Utah pollster Dan Jones conducted a survey of Idaho's Republican voters before the primary and found that Trump had a decent lead over Cruz — 30 percent to 19 percent. But Idaho Mormon voters favored Cruz by 24 percent to Trump's 18 percent.
Jones' poll, on behalf of Zions Bank's Idaho Politics Weekly, was conducted before Romney delivered his blistering attack on Trump in a televised speech at the University of Utah.
In that address, Romney, a Mormon and the 2012 Republican presidential nominee, slammed Trump for being a bully, a bad businessman and a politician who could lead the nation into "the abyss."
Jones argues that Romney's speech likely had a significant impact on LDS voters, and the pollster shared his own view on why Mormons haven't taken to Trump: "It is because of his language, his arrogance and crudeness, to be honest with you." Trump has peppered his rallies with expletives and in a recent debate referred to the size of his penis.
Jones conducted a poll of Utah Republican voters in mid-February that showed Trump coming in third behind Cruz and Sen. Marco Rubio, R-Fla., one of his worst showings in any survey.
Beyond Trump's occasional cursing, he said, Mormons tend to be more liberal on immigration, where Trump has taken a hard line, promising to build a huge wall along the southern border and to force Mexico to pay for it.
Jones also said Latter-day Saints tend to be more accepting of establishment players, like Romney, rather than insurgent figures, like Trump.
The Idaho vote was more anti-Trump than pro-Cruz, Jones believes, because his polling shows that the Texas senator is not particularly well liked in the Gem State.
But Miles, the BYU-Idaho professor, believes many southern Idahoans, including Mormons, were attracted to Cruz's focus on the U.S. Constitution.