Supreme Court Blocks Trump’s Mail-Voting Restrictions Ahead of US Midterms

The U.S. Supreme Court has rejected the Trump administration’s attempt to implement new restrictions on mail-in voting ahead of the November midterm elections, delivering a significant legal setback to President Donald Trump as voting is already underway in some states.

In a 7-2 emergency ruling on Monday, September 14, the justices declined to lift a lower-court injunction blocking a new U.S. Postal Service rule that would have imposed additional requirements on states sending mail-in ballots. Justices Clarence Thomas and Samuel Alito dissented.

The decision means states can continue using their existing procedures for sending mail ballots for the 2026 midterm elections, which are scheduled for November 3.

Trump’s administration had argued that the new rules were necessary to strengthen election security and prevent fraud. The proposed system would have required states to provide the Postal Service with lists of eligible mail voters and use specific envelope designs and other requirements, with USPS given authority to reject ballots that did not comply.

The administration’s plan followed an executive order issued by Trump in March seeking to tighten federal oversight of mail-in voting. The move triggered lawsuits from Democratic-led states, voting-rights organisations and other groups, who argued that the federal government was exceeding its authority and that the changes could disrupt the administration of the upcoming election.

Opponents also warned that implementing a new mail-ballot system so close to the election could create confusion for election officials and voters. Court filings said some states had already printed ballots and envelopes and begun sending them to voters, making a last-minute overhaul particularly difficult.

Justice Ketanji Brown Jackson, writing for the court, said the government was unlikely to succeed in its challenge to the lower court’s injunction. Justice Brett Kavanaugh agreed with the outcome, while indicating that the legal questions surrounding the Postal Service’s authority could receive further consideration.

The ruling represents another setback for Trump’s campaign to reshape the country’s voting system. Trump has repeatedly criticised mail-in voting and alleged widespread election fraud, although election experts and studies have found that fraud involving mail ballots is extremely rare.

Voting-rights groups and Democratic officials welcomed Monday’s decision, arguing that allowing the new rules to take effect weeks before the election could have disrupted legally cast ballots.

The Trump administration, however, maintains that its efforts are aimed at improving election integrity rather than restricting voters.

The Supreme Court’s action leaves the existing mail-voting procedures in place for the 2026 midterms while the broader legal fight over the administration’s authority to impose changes continues.