Democratic incumbent Sen. Bob Casey Jr. faces a well-financed challenge from Republican Dave McCormick in Pennsylvania’s nationally-watched U.S. Senate race. While Casey held a lead for much of the campaign, the race tightened in the final days ...

Pa. Sen. Bob Casey's campaign said votes remain to be counted, but GOP challenger Dave McCormick sounded jubilant.

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.