Mormons are the most heavily Republican-leaning religious group in the U.S., while a pair of major historically black Protestant denominations are two of the most reliably Democratic groups.
Looking at the religious makeup of individual states, and at each party’s potential voters within a particular state, can help in understanding the electoral landscape.
Nationwide, 52% of Americans support gay marriage. In the South, 44% of people support gay marriage – well below the East (61%), West (58%) and Midwest (52%).