Justice Samuel Alito warned the Supreme Court's decision allowing late-arriving mail ballots to count could undermine confidence in elections.

The Supreme Court, in a 5-4 decision, upheld state laws that allow the counting of late-arriving mail-in ballots even if they were postmarked by Election Day.

A view of the US Supreme Court in Washington, DC, on June 25, 2026. Saul Loeb | AFP | Getty ImagesThe Supreme Court on Monday ruled that Mississippi can continue to count some…