The Obama campaign talks a lot about new ideas and expanding the political map, but in the swing state of Pennsylvania, which the campaign has focused on almost exclusively since the Democratic convention, old-school issues still rise to the fore. The latest example came Friday during a small political event at SCHOTT North America Inc., a glass factory in Duryea, Pa., where even a hand-picked crowd threw Barack Obama a curve ball. A woman in the crowd told Obama she had “heard a rumor” that he might be planning some sort of gun ban upon being elected president. Obama trotted...