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, with no sign of a concession speech coming from either campaign.

The firefighters' union representing Pennsylvania’s largest city endorsed Republican businessman David McCormick in the hotly contested U.S. Senate race Thursday. The president of IAFF Local 22, the union representing more than 4,

Casey v. McCormick tracks as second-most expensive race in the nation in a year where every seat counts in the battle for majority control of the U.S. Senate.