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

David McCormick at Donald Trump's Pittsburgh rally. (Charly Triballeau/AFP/Getty Images) Republican Senate candidate Dave ...

David McCormick is currently ahead of the incumbent Democratic Senator Bob Casey by a narrow margin, according to the AP.

David McCormick, Republican, declared his victory over Democrat Sen. Bob Casey in a contentious senate seat race in ...

Pennsylvania's U.S. Senate race between three-term Democratic Sen. Bob Casey and Republican challenger David McCormick could help Republicans pad their newfound majority.

Pennsylvania’s Senate contest between Democratic incumbent Bob Casey and Republican challenger David McCormick is still too ...

WASHINGTON - Republican challenger David McCormick has a narrow lead against Democratic Sen. Bob Casey, as the Pennsylvania ...

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

Incumbent U.S. Sen. Bob Casey is not ready to give up his seat just yet, even as the margin of votes show the three-term ...

With no decisive winner called in the tight race for Pennsylvania’s U.S. Senate seat, David McCormick’s campaign manager said ...