WASHINGTON Let's get it straight. The president and the pope aren't riding the new gay wave."I believe a marriage is between a man and a woman," said President Bush last week. "And I think we ought to codify that one way or the other. And we've got lawyers looking at the best way to do that." Trying to add a tolerant note to an intolerant policy, he allowed that he was "mindful that we're all sinners."Last time I checked, we had separation of church and state, so I don't know why the president is talking about sin, or why he...