There’s no religious test for office, and there shouldn’t be. My Baptist ancestors were willing to make alliances with the heretical Thomas Jefferson because he believed in religious liberty. It didn’t matter that they never would have let him teach Sunday school.

We should not demand to see the long-form certificate for Mr. Trump’s second birth. We should, though, ask about his personal character and fitness for office. His personal morality is clear, not because of tabloid exposés but because of his own boasts. His attitude toward women is that of a Bronze Age warlord. He tells us in one of his books that he revels in the fact that he gets to sleep with some of the “top women in the world.” He has divorced two wives (so far) for other women.

This should not be surprising to social conservatives in a culture shaped by pornographic understandings of the meaning of love and sex. What is surprising is that some self-identified evangelicals are telling pollsters they’re for Mr. Trump. Worse, some social conservative leaders are praising Mr. Trump for “telling it like it is.”

In the 1990s, some of these social conservatives argued that “If Bill Clinton’s wife can’t trust him, neither can we.” If character matters, character matters. Today’s evangelicals should ask, “Whatever happened to our commitment to ‘traditional family values’?”

Mr. Trump tells us “nothing beats the Bible,” and once said to an audience that he knows how Billy Graham feels. He says of evangelicals: “I love them. They love me.” And yet, he regularly ridicules evangelicals, with almost as much glee as he does Hispanics. This goes beyond his trivialization of communion with his recent comments about “my little cracker” as a way to ask forgiveness. In recent years, he has suggested that evangelical missionaries not be treated in the United States for Ebola, since they chose to go overseas in the first place.