Pa. Senate race goes into recount as GOP files lawsuits - WHYY
Pa. election: Mail ballot battle exemplifies messy disputes - WHYY
Court to Pa. counties: Stop counting misdated mail-in ballots - WHYY
Bucks GOP condemns Dem. commissioners over mail ballots - WHYY
The controversy comes as the Senate race between incumbent Democratic Sen. Bob Casey and Republican challenger Dave McCormick has gone to a recount.