Supreme Court allows counts of late-arriving mail ballots

The Supreme Court upheld Mississippi's law permitting election officials to count mail ballots postmarked by Election Day even if they arrive up to five days later. The 5-4 decision, authored by Justice Amy Coney Barrett, rejected a Republican challenge to the practice.

The ruling preserves similar mail ballot counting procedures in more than two dozen states across the country. This decision reflects a continuing divide on the nine-member court over voting access and election administration, with Barrett's majority opinion siding with election officials' authority to process late-arriving ballots.

Republicans had challenged the Mississippi law, arguing that counting ballots received after Election Day violates federal election law. The challenge represented a broader GOP effort to tighten ballot deadlines in key battleground states. The party has increasingly focused litigation on mail voting procedures, claiming late-arriving ballots create vulnerability to fraud. Election officials and voting rights advocates counter that postmark-based deadlines account for mail delivery delays and expand voter access without compromising election integrity.

Barrett's decision signals that at least one of the court's conservative justices supports flexibility in ballot counting procedures when postmarks provide documentation of timely voter intent. The 5-4 breakdown indicates that the four dissenting justices sided with the Republican challengers, suggesting ongoing tension over voting procedures within the conservative wing of the court.

The decision carries particular weight heading into election cycles, as mail voting has become increasingly prevalent since the 2020 presidential election. States employing similar postmark-based counting rules now have Supreme Court validation for their procedures, removing a major legal vulnerability. Republican efforts to challenge such laws in other states may face steeper obstacles following this ruling, though the narrow 5-4 margin indicates the court remains divided on voting administration questions.