The Associated Press called the race for Republican David McCormick when Casey was trailing him by about 30,000 votes.

Republican U.S. Senate candidate Dave McCormick on Thursday appeared to declare victory in his race against Democratic ...

Republican Dave McCormick defeated incumbent Democratic Sen. Bob Casey in Pennsylvania’s pivotal Senate race, the Associated ...

Republican Dave McCormick was projected to defeat Sen. Bob Casey (D-Pa.), denying him a fourth term in an upset that signals ...

Republican Dave McCormick appeared to win a major upset in Pennsylvania, beating three-term incumbent Bob Casey. The victory ...

Republican David McCormick has won Pennsylvania’s pivotal U.S. Senate seat, beating three-term Democratic Sen. Bob Casey ...

Bill Clark/CQ-Roll Call, Inc via Getty; ANDREW CABALLERO-REYNOLDS/AFP via Getty Former hedge fund CEO Dave McCormick has ...

NEW STORY: Republican Dave McCormick flips pivotal Pennsylvania Senate seat, defeating Bob Casey Pennsylvania’s three-term ...

Republican Senate candidate and former Bridgewater CEO Dave McCormick has staged a come-from-behind victory against Sen. Bob ...

Republican Dave McCormick has unseated Sen. Bob Casey, winning a Pennsylvania U.S. Senate seat that Casey has held for nearly ...

With McCormick's victory, Republicans have expanded their Senate majority in the next Congress to 53 seats, with two races ...