AdvertisementPennsylvania Supreme Court Extends Vote By Mail Deadline, Allows Drop BoxesSeptember 17, 2020Sam GringlasfacebookEmailBenjamin Graff, center, and his son Jacob Graff, 19, drop off their mail-in ballots for the Pennsylvania primary election, in Philadelphia, on June 2, 2020. The state Supreme Court affirmed Thursday that counties may use drop boxes for voters casting mail-in ballots. (AP)