This seems to support the argument, advanced by Tim Carney of the Washington Examiner among others, that support for populism correlates with a kind of communal breakdown, in which secularization is one variable among many leaving people feeling isolated and angry, and drawing them to the ersatz solidarity of white identity politics
Meanwhile frequent church attenders, already a minority within the wider society, are also a minority within the Republican coalition. Relatively few Republicans are explicitly religiously unaffiliated (though that number has been climbing too), but only about a third of Trump’s 2016 voters are in church on a typical Sunday, and almost half attend seldom or not at all.
This suggests a possibility that should worry both Trump’s religious supporters and anyone concerned and anyone who finds his style of conservatism racially toxic. Despite their resistance to that toxicity, the churchgoers in this survey did vote for him, making a pragmatic bet that his policies on abortion and religious liberty were worth living with his Caligulan personal life and racial demagoguery. To defend that bet, some historically-inclined believers have cited past cases where Christians accepted bargains with a not-particularly moral leaders — including the way the early church accepted the patronage of Roman emperors, from Constantine onward, whose personal piety was limited at best.