Republicans are going to court in Pennsylvania amid vote counting in the U.S. Senate election between Democratic Sen. Bob Casey and Republican David McCormick, with the contest headed toward a state-mandated recount.

Republicans asked the Pennsylvania Supreme Court Thursday to again ensure that mail ballots with a missing or improper date are not counted in this year’s election, accusing multiple counties of

Pennsylvania’s nationally watched U.S. Senate race is headed to a recount after incumbent Sen. Bob Casey did not waive an automatic recount. The Associated Press called the race last week for Republican Dave McCormick,