By Michael Lipka, Pew Research Center.
Mormons are the most heavily Republican-leaning religious group in the U.S., while a pair of major historically black Protestant denominations – the African Methodist Episcopal (AME) Church and the National Baptist Convention – are two of the most reliably Democratic groups, according to data from Pew Research Center’s 2014 Religious Landscape Study.
Seven-in-ten U.S. Mormons identify with the Republican Party or say they lean toward the GOP, compared with 19% who identify as or lean Democratic – a difference of 51 percentage points. That’s the biggest gap in favor of the GOP out of 30 religious groups we analyzed, which include Protestant denominations, other religious groups and three categories of people who are religiously unaffiliated.
At the other end of the spectrum, an overwhelming majority of members of the AME Church (92%) identify with or lean toward the Democratic Party, while just 4% say they favor the Republican Party (an 88-point gap). Similarly, 87% of members of the National Baptist Convention and 75% of members of the Church of God in Christ (another historically black denomination) identify as Democrats.