The U.S. Supreme Court ruled 5-4 [1] on Monday to allow states to maintain grace periods for counting mail-in ballots after Election Day.

The decision limits the power of the federal government to preempt state-level election rules. This ruling represents a significant legal setback for former President Donald Trump and the Republican National Committee, who sought to restrict the window for ballot processing to ensure faster results.

Under the ruling, states may continue to count ballots that arrive after the polls close, provided they follow established state laws. In Mississippi, for example, this allows ballots to be counted up to five days [3] after Election Day. This legal framework currently applies to more than a dozen states [2] that utilize similar post-election grace periods.

The case centered on whether the federal government could override these state-specific rules. The Court held that states retain the authority to set their own deadlines for ballot processing, a decision that restricts the Trump administration's claims regarding presidential power over election administration.

Chief Justice John Roberts presided over the court during the issuance of the decision. The 5-4 [1] split reflects a narrow divide among the justices on the intersection of federal oversight and state sovereignty in the electoral process.

Legal challenges to mail-in voting have become a focal point for the Republican National Committee. By upholding these grace periods, the Court ensures that current state laws remain in effect heading into future election cycles, preventing a federal mandate that would invalidate ballots arriving shortly after the official deadline.

The Court ruled 5-4 to allow states to keep post-election grace periods for mail-in ballots.

This ruling reinforces the principle of state-led election administration over federal intervention. By protecting grace periods, the Court has ensured that millions of voters in more than a dozen states can still have their ballots counted if they arrive within a few days of the deadline. This reduces the likelihood of large-scale ballot disqualifications based on postal delays, though it maintains the possibility of prolonged vote-counting periods that often lead to political tension during election nights.