These charts show how our forecast has changed over the course of the night. As a rule, when the electoral vote estimate is ...

Republican Dave McCormick defeated incumbent Democratic Sen. Bob Casey in Pennsylvania’s pivotal Senate race, the Associated Press projected Thursday evening, delivering the GOP yet another win after ...

Democrats were projected to win at least 203 House seats and Republicans 211 seats as of Thursday afternoon. A party needs ...

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

The Pennsylvania secretary of state announced Thursday that there are 100,000 ballots left to be counted, but the AP says that’s not enough for a comeback. The margin could still trigger a recount if ...

McCormick cut Casey's leads in Philadelphia and its suburbs and built leads in the more GOP-leaning parts of Pennsylvania, ...

Republicans won the Senate but are looking to stretch their majority. The House is still uncalled. And Trump has won another ...

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 ...

The biggest concern Republicans had with Lake heading into the election still hangs over the race amid vote-counting.

As of Thursday night, McCormick led by roughly 33,000 votes over Casey. ABC News has not yet projected a winner in the race.

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