A Hidden New Threat to U.S. Elections

It’s been more than nine weeks since the Pennsylvania primary. The election is still not certified.

The reason: Three counties — Berks, Fayette and Lancaster — are refusing to process absentee ballots that were received in a timely manner and are otherwise valid, except the voter did not write a date on the declaration printed on the ballot’s return envelope.

The Pennsylvania attorney general has argued in court amid a lawsuit against…