Pew Research reports that 74% of American LDS identify with, or lean towards, the Republican Party.
"Mormons in America – Certain in Their Beliefs, Uncertain of Their Place in Society," Pew Research Center, January 12, 2012, accessed April 12, 2022
Politically, Mormons are quite conservative and supportive of the Republican Party – even compared with other people who share some of their demographic characteristics. Two-thirds of Mormons (66%) describe themselves as politically conservative, and three-quarters of Mormon voters (74%) identify with or lean toward the Republican Party. By comparison, Pew Research Center surveys conducted from September-November 2011 find that 37% of U.S. adults describe themselves as conservative (including 40% of white non-Mormons residing in the Mountain West). And 45% of registered voters in the population as a whole (and 60% of white non-Mormons in the Mountain West) identify with the Republican Party.