MEDIA, Pa.—On a cigarette break outside the Seven Stones coffee house yesterday, Ashleigh Piazza, 23, did not hesitate when asked how Democratic nominee Barack Obama's race could affect his success here in southeastern Pennsylvania. "It's kind of sad to say, but I think it's a major issue," said Piazza, a file clerk at the nearby Delaware County Courthouse, where in a few hours GOP nominee John McCain and his running mate, Sarah Palin, would hold a rally. "There's lots of talk about his race around town," says Piazza. An Obama supporter even offered Piazza's mom $40 at a local bar...