evidence: Around a third of registered voters in the U.S. (34%) identify as independents, while 33% identify as Democrats and 29% identify as Republicans, according to a Center analysis of Americans’ partisan identification based on surveys of more than 12,000 registered voters in 2018 and 2019. [...] Christians account for the majority of registered voters in the U.S. (64%). But this figure is down from 79% as recently as 2008. The share of voters who identify as religiously unaffiliated has nearly doubled during that span, from 15% to 28%.