An automatic recount has been triggered in the U.S. Senate race in Pennsylvania between Bob Casey and Dave McCormick. Here's how the recount will work.

Casey has refused to concede despite multiple outlets calling the race for David McCormick, with the recount due to be completed by Nov. 26.

Republican Dave McCormick leads Democratic Sen. Bob Casey by about 28,000 votes, under the 0.5 percentage point threshold for an automatic recount under state law.