He bravely helps keep all those slings and arrows from fellow Democrats away from pal Sen. Barack Obama, but it's the sting of the little bee that keeps Sen. Robert Casey up at night. Obama's point man in the Pennsylvania primary fesses up that he's scared of honeybees. At Penn State University to look at bees, he put on a beekeeper's suit before walking near a hive. "I was scared to death," he says. "They were showing us a lot of bees, tame and not a threat to people like me, but I felt that I was threatened. At one point, a scientist said, 'Senator . . . you look afraid of them,' and I said, 'I am!' "