As vote counting continues this week in Pennsylvania’s tight Senate race, attention is once again shifting toward the largest and most hotly contested tranche of remaining votes that could help Democratic Sen.

After days of the race being too close to call, the Associated Press named Republican Dave McCormick the winner in the race for one of Pennsylvania’s two seats in the U.S. Senate, defeating incumbent Democrat Bob Casey. McCormick first addressed supporters at his election night party in Pittsburgh when the race was too close to call.

The Associated Press says Republican Dave McCormick has unseated Sen. Bob Casey, winning a Pennsylvania U.S. Senate seat that Casey has held for nearly two decades. McCormick, 59, recaptured a GOP seat in Pennsylvania that Republicans lost in 2022.