Romney avoids mentioning it, but [Joseph] Smith ran for president in 1844 as an independent commander in chief of an “army of God” advocating the overthrow of the U.S. government in favor of a Mormon-ruled theocracy. Challenging Democrat James Polk and Whig Henry Clay, Smith prophesied that if the U.S. Congress did not accede to his demands that “they shall be broken up as a government and God shall damn them.” Smith viewed capturing the presidency as part of the mission of the church. He had predicted the emergence of “the one Mighty and Strong” — a leader who would...