Democratic incumbent Sen. Bob Casey left his election watch party early Tuesday night after polls reported GOP challenger David McCormick in the lead for the U.S. Senate race.

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

Pennsylvania’s U.S. Senate race between three-term Democratic Sen. Bob Casey and Republican challenger David McCormick will help determine control of the chamber Tuesday in a battleground state contest that is one of the nation’s most expensive this year.

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

Pennsylvania Sen. Bob Casey is vying for a fourth term against challenger and businessman Dave McCormick in an extremely close race that could ultimately play a role in the balance of power in the United States Senate.

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,