The Republican Senate candidate points to clear rulings from the Pennsylvania Supreme Court that undated and incorrectly ...

Pennsylvania's US Senate race between incumbent Democrat Bob Casey and Republican challenger Dave McCormick is going to an ...

GOP businessman Dave McCormick has won a spot in the U.S. Senate on his second attempt, unseating longtime Pennsylvania Sen.

Republican Dave McCormick, an Army veteran and former hedge fund CEO, has unseated three-term Democratic Sen. Bob Casey Jr.

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

Sen. Bob Casey’s refusal to concede the election is damaging the citizens of Pennsylvania. Republican Dave McCormick defeated ...

Is Pennsylvania’s U.S. Senate race over? It depends whom you ask. And for Republican Dave McCormick, declared the winner by ...

One of Pennsylvania's two U.S. Senate seats is before voters Tuesday, with Sen. Bob Casey vying for a fourth term against ...

The Pennsylvania Senate race between incumbent Bob Casey, left, and his Republican challenger, Dave McCormick, is headed for ...

Republican businessman David McCormick has won an upset in Pennsylvania’s U.S. Senate race against Democratic incumbent Bob ...

Though Election Day is past, swing-state advertising isn’t. A new ad hit Pennsylvania airwaves Tuesday calling on three-term ...

The Associated Press called the Pennsylvania Senate race for Dave McCormick Thursday. It's a stunning upset. Here's how he did it.