Nate Silver @NateSilver538
Yeah. Religious white Christians are the most reliably Republican voters. Black voters are the most reliably Democratic ones (other nonwhite groups to a slightly lesser degree). So states with a lot of irreligious whites tend to be swingy. — PolitiTweet.org
Patrick Ruffini @PatrickRuffini
Very correlated with % of black voters https://t.co/cEm0eyaGTi