President Obama does not treat all conspiracy theories alike. He dismisses those who question where he was born, but he's unsettled by those who question whether he is born again. At the National Prayer Breakfast last week, he said his Christian faith has sustained him through his presidency—"all the more so," he said, "when Michelle and I hear our faith questioned."Americans like their presidents to share their values, and religion is often a proxy for that connection. There has b...