Wyoming is an open primary state, and the state has the second highest proportion of Mormons to the rest of the population (1/9 of Wyoming residents are Mormon).
The one thing I am learning is that we have a ton of Mormons in the United States. Goodness every state seems to have millions and millions of Mormons. Mormons in the United States clearly is larger then the Protestants (I know Catholics are behind Protestants in numbers in the US) according to this primary. I am surprised that they are not even more powerful than they are with so many of them.