The Supreme Court dealt a significant blow to election integrity efforts Monday, ruling 5-4 in Watson v. Republican National Committee that federal law does not require mail-in ballots to be received by Election Day — only that voters must make their choice on that day — preserving post-Election Day ballot counting windows in roughly 30 states and drawing an eruption of fury from conservatives who placed Justice Amy Coney Barrett on the court.
Barrett, nominated by President Trump in 2020 to fill the seat of the late Justice Ruth Bader Ginsburg, authored the majority opinion and was joined by Chief Justice John Roberts and the court's three liberal justices — Sonia Sotomayor, Elena Kagan, and Ketanji Brown Jackson. The ruling reversed a Fifth Circuit panel decision that had sided with the Republican National Committee's challenge to Mississippi's law allowing mail ballots to be counted up to five business days after Election Day, provided they are postmarked by Election Day. Barrett's majority held that federal election-day statutes set a deadline for when voters must cast their ballots, not for when those ballots must arrive — and that nothing in federal law prohibits states from implementing grace periods for ballot receipt.
"A shockingly wrong opinion. Justice Barrett joins with the liberal justices to hold that federal election law does not preempt states who allow late mail-in ballots to be counted. This is terrible for election integrity. Another reason we must pass the full SAVE Act." — Sen. Eric Schmitt (R-MO)
Justice Samuel Alito authored a blistering dissent joined fully by Justices Clarence Thomas and Neil Gorsuch, and in part by Justice Brett Kavanaugh. Alito argued that from the nation's founding through most of the twentieth century, holding an election on a particular day meant completing ballot collection on that day — and that the majority's reading risks undermining Americans' confidence in election outcomes by turning a clear deadline into an elastic window. President Trump called the decision a "tremendous loss" on Truth Social and urged Congress to immediately pass the SAVE America Act, which would impose voter ID requirements, proof of citizenship for registration, and severe restrictions on mail-in voting.
The conservative backlash against Barrett was swift and harsh. Commentators called her the worst GOP judicial appointment in history, worse even than Chief Justice Roberts. Podcaster Megyn Kelly captured the sentiment of many: "Barrett. AGAIN. WTF." The ruling lands with particular sting because it comes just months before the 2026 midterm elections, preserving ballot receipt windows in a dozen-plus states at a moment when every Senate seat could determine control of Congress. The Trump administration had backed the RNC's challenge.
The Watson ruling is the second time this term that Barrett has joined the liberal bloc against a position backed by the Trump administration and conservative legal movement — she also joined Roberts and Gorsuch to strike down Trump's signature tariff policy earlier in the year. Mississippi passed its post-Election Day ballot receipt law in 2020 during the COVID-19 pandemic. The ruling preserves similar laws across 14 states plus Washington, D.C., including several key battleground states heading into November.
Barrett's opinion may be legally defensible on narrow statutory grounds, but it is a political and practical disaster for election integrity. Extended mail ballot windows create opportunities for chain-of-custody problems, postmark disputes, and the kind of prolonged, uncertain counts that have eroded public confidence in American elections. The majority punted the question to Congress — which is exactly where it should be resolved. Senate Republicans must treat this ruling as the starting gun for passing the SAVE Act, not the end of the fight.