Yes, voter fraud in Filthadelphia is a problem, but what really killed the GOP in national elections was the shift of the suburban counties to the Dems. Since Obama is not a "New Democrat" like Clinton, many of the ditzy haus fraus appear to be waking up.
Cautionary Note: These are Rhino areas. Don't expect the Philadelphia 'burbs to vote for a real conservative unless the Dems completely implode.