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.

In the race for a critical Senate seat, Pennsylvania incumbent Bob Casey Jr. was challenged by Republican Bob McCormick.

Counties must begin counting ballots by Nov. 20 in the state-mandated recount of Pennsylvania's U.S. Senate race

The Republican candidate led incumbent Bob Casey by over 25,000 votes as the tight race triggered an automatic recount.

"While votes continue to be counted, any way you slice it, Dave McCormick will be the next United States Senator from Pennsylvania."

Pennsylvania will recount the race between incumbent Democratic Sen. Bob Casey and Republican David McCormick, who leads by 28,000 votes.

Republicans are going to court in Pennsylvania amid vote counting in the U.S. Senate election between Democratic Sen. Bob Casey and Republican David McCormick, with the contest headed toward a state-m

The tight margin in the Senate race between Sen. Bob Casey, D-Pennsylvania and Republican Sen.-elect Dave McCormick has triggered an automatic recount under Pennsylvania law.

A small margin in votes separating incumbent Democratic Sen. Bob Casey from Republican challenger David McCormick Jr. has triggered a recount in the Pennsylvania Senate race, the commonwealth's secretary said Wednesday.