This, from the AP’s “entrance” poll in Nevada:
About a quarter of Nevada GOP voters were Mormon, and virtually all of them preferred Mitt Romney. Overall, about half of Romney’s Nevada votes came from Mormons. Among non-Mormons, he had a slight lead over Ron Paul. National polls have shown that his Mormon religion is a problem for significant numbers of Republican voters. Romney and Mike Huckabee were doing best among white born-again and evangelical Christians.