David McCormick filed a lawsuit challenging at least 15,000 provisional ballots in Philadelphia in the Pennsylvania Senate race, hours after claiming victory over Democratic Senator Bob Casey.McCormick,

Republican David McCormick cut Democratic Sen. Bob Casey’s leads in Philadelphia and its populous suburbs and built leads in the more GOP-leaning parts of Pennsylvania, foreclosing the incumbent’s pat

Pennsylvania's U.S. Senate contest between Democratic incumbent Bob Casey and Republican challenger David McCormick was still too close to call, according to NBC News. However, the Associated Press called the race for McCormick.