Republican David McCormick cut Democratic Sen. Bob Casey’s leads in Philadelphia and its populous suburbs and built leads in ...

Democratic Senator Bob Casey has not conceded after Republican challenger David McCormick won Pennsylvania's U.S. Senate seat ...

David McCormick filed a lawsuit challenging at least 15,000 provisional ballots in Philadelphia in the Pennsylvania Senate ...

Race between Senator Bob Casey and challenger Dave McCormick may trigger an automatic recount if the vote tally ends up too close.

The former hedge-fund manager’s victory over Democratic incumbent Bob Casey brings the GOP total to 53 seats.

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

Senator Bob Casey, the Democratic incumbent, is an institution in Pennsylvania. His Republican opponent is David McCormick, ...

Forecasters believed both candidates had roughly equal chances of winning. The Cook Political Report classified Pennsylvania's Senate race as a toss-up, a decision made in the weeks before Election ...

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

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

"Casey was running in a very tough environment for incumbents. ... People are sick of Washington and politics as usual," a ...

Pennsylvania’s U.S. Senate race between three-term Democratic Sen. Bob Casey and Republican David McCormick will help ...