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,

In the upcoming U.S. Senate election, Republican Dave McCormick is challenging Democratic Sen. Bob Casey for his seat in Pennsylvania.

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.