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

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-m

The secretary of state said the Pa. Senate race has gone into automatic recount. GOP candidate David McCormick has sued to stop officials from counting some mail-in ballots.

Thousands of mail-in ballots in the battleground state of Pennsylvania have been targeted for rejection as part of a last-minute campaign that has set off alarms for voting rights groups and exasperated local election officials.

More than 4,000 mail ballot applications have been challenged across 14 Pennsylvania counties, leaving election officials to decide eligibility during hearings that will extend well past Election Day.

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As the race for Pennsylvania’s U.S. Senate seat headed to a recount, the Republican National Committee sued all 67 county boards of elections Thursday to enforce the requirement for voters to write the date on mail-in ballots.