Barack Obama was on the trail in Pennsylvania Thursday, and gave a press conference in which he shot back at vice presidential nominee Sarah Palin. Palin tweaked Obama for his record as a community organizer. Obama said he’d heard tougher taunts on the basketball court. But the main event for Obama was his interview with Fox News talker Bill O’Reilly taped in York, Pa. The first part of the sometimes awkward interview aired Thursday night.