When he first ran for Senate 18 years ago, Bob Casey won 34 of Pennsylvania’s 67 counties en route to a sweeping victory that showed mostly blue across the Keystone State’s political map.

This has given Erie outsize political power. “Candidates learn quickly that they can’t win Pennsylvania without Erie County,” Ethan Kibbe, a reporter and anchor for Erie News Now ...

But candidate campaigns and political analysts also ... Particularly with Pennsylvania’s importance on the electoral map, Lackawanna County and places demographically similar to it – largely ...