Even before Liz Cheney’s drubbing this week, former president Donald Trump’s continuing influence in the Republican party was clear. I have given much thought to why Trump seems to be such a clear dividing line in politics generally and even among persons who would otherwise consider themselves all to be evangelicals. This is my thesis: Those who so enthusiastically embrace and hate Mr. Trump share the same fundamental belief as to how the world works. That belief, I believe, is the product of Enlightenment thinking and, if my thesis is correct, is an indictment of evangelicalism.