Listen for a few minutes to Joey Vento, owner of a south Philadelphia institution that serves gut-busting sandwiches through a takeaway hatch, and the scale of Barack Obama's problems become apparent. Obama is having the worst week of his campaign. It is, some believe, a week that threatens his chances of becoming president. "That minister, that was terrible, all his sayings. He's preaching hatred," Vento said. "The thing I didn't like about Obama; you're telling me for 20 years you been going to that church and you never heard that?" Vento, 68, was speaking about Obama's former pastor and spiritual...