ok so reality check...
Philly county has 644,768 total votes currently with close to 100% reporting.
10% rather than 8% of that total is (generously) 65,000
Current lead for Obama in PA? 284,000 votes
So even if we amplify your 8% claim to 10% and over-round it is still not even close to making a difference.
Also if you are going to make claims about such contentious things it would be nice to cite some source.
My numbers above come from google's election results site