US Supreme Court blocks USPS mail-in ballot rule changes ahead of midterms

The Supreme Court declined to lift a lower court injunction against USPS rule changes affecting mail-in ballot processing, citing low likelihood of government success on merits. This preserves existing ballot handling procedures for the upcoming midterm elections, reducing risk of delivery delays. The ruling is a procedural setback for the administration and a win for voting-rights groups, with implications for election administration and postal operations.