Last week, a flurry of litigation in Pennsylvania clarified the rules for mail balloting there. In short, mail ballots will still be rejected in the key battleground state if voters fail to properly date the affidavit that accompanies their ballot — but voters who make any mistake with their mail ballot will be able to vote by provisional ballot instead on Election Day.

As all eyes look to Pennsylvania, voters across the Commonwealth took to the polls to cast their ballots. With more than one million ballots already sent in by mail, millions more are expected to be cast.