More Mormons (60 percent) identify themselves as conservatives than any other religious group; they also lead every other group in GOP party identification (at 65 percent)--much higher than the general population in both categories. Here are a few of Pew's charts to break it down:
Keep in mind that GOP identification is very low right now--only 35 percent of the general population identify themselves as Republicans--making the Mormon numbers even higher by comparison. Evangelicals, for instance--a group that has, for the past decade, been counted as an influential Republican voting bloc--identify with the GOP at a 50 percent rate, a full 15 percent lower than Mormons.
The only group that's more partisan is members of historically black churches, according to Pew, 77 percent of whom identify themselves as Democrats. (Though that's more of a racial subset of a religious category, than it is a religious category in its own right.)
Perhaps unsurprisingly, Mormons are much more socially conservative than both the general population and other groups: 70 percent say abortion should be illegal in all or most cases, compared to 42 percent of the general population and 35 percent for Evangelicals. 68 percent say homosexuality should be discouraged, rather than accepted--that's in line with evangelicals (64 percent) and Muslims (61 percent)--hence the LDS church's involvement in Prop. 8--but lower than the general population, 40 percent of which shares that opinion.