PHILADELPHIA — Pennsylvania’s nationally watched U.S. Senate race between Democratic incumbent Bob Casey Jr. and Republican challenger Dave McCormick was still too close to call as of mid-morning on Wednesday,

Republican Dave McCormick holds a narrow lead over Democrat Sen. Bob Casey in the U.S. Senate race in Pennsylvania, with final votes still being counted.

One of Pennsylvania’s two U.S. Senate seats is before voters Tuesday. Incumbent Democrat Bob Casey is vying for a fourth term against republican challenger and businessman Dave McCormick. Let’s start with incumbent Senator Bob Casey.

In the race for Pennsylvania's U.S. Senate seat, challenger and Republican Dave McCormick is leading over Democrat incumbent Bob Casey, but right now the race is too close to call. KDKA-TV's Jennifer Borrasso spent election night at the Casey headquarters and has reaction from Scranton.

Pennsylvania’s U.S. Senate race between U.S. Sen. Bob Casey and Republican David McCormick could help Republicans pad their newfound majority in the chamber. McCormick led vote counting early Wednesda

"Casey was running in a very tough environment for incumbents. ... People are sick of Washington and politics as usual," a political analyst tells Pittsburgh's Action News 4.

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

As of early Wednesday morning, Pennsylvania’s nationally watched U.S. Senate race between Democratic incumbent Bob Casey Jr. and Republican challenger Dave McCormick was still too close to call. While Casey held a lead for much of the campaign,