Seven years after Jeremiah Wright came to national fame as President Obama’s radical pastor, a man who declared “God damn America” from the pulpit, the president’s faith is still a matter of controversy. With a new presidential election looming, it’s apparently urgently important for members of the media to know whether Republicans such as Scott Walker believe that President Obama is a Christian. Walker’s answer — “I don’t know” — is not one the media want to hear. But how can any man know another man’s heart — especially the heart of a person he’s never met? Who but...