The U.S. Senate race in Pennsylvania between Democratic incumbent Bob Casey and Republican David McCormick will undergo a recount after unofficial results showed a razor-thin margin. With McCormick leading by approximately 28,000 votes, just below the 0.5% threshold requiring a recount, Secretary of the Commonwealth Al Schmidt announced that counties must begin the recount by November 20 and complete it by November 26. Casey has not conceded the race, and both campaigns are engaged in legal disputes over provisional and mail-in ballots. Final results will be announced on November 27.