HANOVER, N.H. – In the final moments of the Democratic presidential debate here last night, after nearly two hours of wading through their differences on Iraq, health care, tax policy and a variety of other weighty matters, the candidates were asked a crisp question: What is your favorite Bible verse? Senator Barack Obama: “The Sermon on the Mount, because it expresses a basic principle that I think we’ve lost over the last six years.” Senator Hillary Rodham Clinton: “The Golden Rule: Do unto others as you would have them do unto you. I think that’s a good rule for politics,...