At The Wall Street Journal, Naomi Schaefer Riley reviews “Seeking the Promised Land,” a book on the emergence of Mormons as cohesive political force. “Mormonism is a quintessentially American religion, founded in the U.S. and kept alive by a persecuted group that eventually sought out a land of its own and rose through piety, self-sufficiency and hard work into prosperity and community well-being,” writes Riley. “It is hard to think of a group that better represents American ideals. Whether that will get a Mormon into the White House is another story.”