SALENA ZITO: Obama Writing Off Pennsylvania? “The latest survey from liberal-leaning Public Policy Polling showed 59 percent of white Pennsylvania voters disapprove of Obama’s job performance, a rate usually found among Southern voters. . . . Six weeks ago, Obama visited Pittsburgh. The union crowd was thin. Enthusiasm was nonexistent; so were local elected Democrats, who opted to shake his hand at the airport rather than stand on stage with him while he talked about jobs.”