Byline: Eve Conant And Richard Wolffe

What does Barack Obama believe? It's a question that an army of surrogates, out trying to assure religious voters of his faith, is answering again and again.

Tim Roemer is a gifted salesman working a tough territory. For weeks, the former Indiana congressman has been crisscrossing primary states trying to convince Roman Catholic voters that Barack Obama is their man. Just a few months ago, there were plenty of takers. Obama beat Hillary Clinton among Catholics in Louisiana and Virginia and tied her in Wisconsin. But in more recent primaries, Catholics have decisively turned away from him. In Ohio, exit polls showed that 65 percent ...