Here’s a map of Pennsylvania Counties.
You can test how Obama is doing by looking at the poll estimates by region.
For Philly, look at Philadelphia County.
For the Philly suburbs, check Delaware, Chester, Montgomery, and Bucks.
For the Northeast, look at Lackawanna, Luzerne, Lehigh, and Northampton.
For Southcentral, check Berks, Lancaster, York, Dauphin, and Adams.
For Central, look at Centre County and some of the surrounding counties.
For Metro Pittsburgh, check Beaver, Butler, Westmoreland, Armstrong, and Washington.
For Pittsburgh, check Allegheny County.
For the Northwest, check Erie County.
Don’t even bother with West Central because there are almost no votes there.