The survey is consistent with other studies, including Robert P. Jones’s work. In “The End of White Christian America,” he documents the turning point at which white Protestants of all denominations could no longer claim a majority of Americans. He posits that this phenomenon is at least partially responsible or the rise in white resentment of urbanites — the feeling of loss of social and cultural primacy — that President Trump so adeptly manipulated.

This and other studies have noted that the drop-off in religious identification is especially evident in the millennial generation. The American Family Survey conducted last year found, “For Millennials and even GenXers, the most common religion is no religion at all. The Nones claim 44% of the 18-29 age group, and nearly that (43%) among those who are 30-44.” That is a dramatic change from other generations. “Among Americans older than 65, just 21% . . . say they are atheist, agnostic, or nothing in particular. However, even that 21% is a five-point rise from where the over-65 group was in 2015, when just 16% identified themselves this way.”