The Supreme Court on Monday upheld a Mississippi law permitting mail-in ballots to be counted if they are postmarked by Election Day and received within five days after the election. By a 5-4 vote in Watson v. Republican National Committee, the justices rejected arguments that federal law requires ballots to be received by Election Day.
The ruling comes roughly four months before the November 2026 midterm elections, potentially affecting how states administer mail voting in upcoming contests.
What the Right Is Saying
Conservative groups, including the Republican National Committee which brought the challenge, argued that federal law sets a clear Election Day deadline for ballots and that states cannot unilaterally extend receipt timelines. These critics say extending ballot counting past Election Day creates uncertainty and risks undermining public confidence in election results.
Justice Samuel Alito, writing for the dissenting bloc, warned that allowing ballots received days after Election Day could complicate certification timelines and create scenarios where winners remain uncertain until well after polls close. Conservative commentators have echoed these concerns, arguing that clear, firm deadlines protect against fraud and ensure timely finalization of results.
State officials in Mississippi and other states with similar laws defended the five-day grace period as a reasonable accommodation that does not change the fundamental Election Day voting deadline. They note the law requires postmarks by Election Day, ensuring ballots reflect voter intent cast before polls close.
What the Left Is Saying
Voting rights advocates who challenged the Mississippi law argued that counting late-arriving ballots expands access for voters who may face difficulties getting their ballots to election offices by Election Day. These groups have long maintained that extended deadlines help accommodate voters with disabilities, those serving in the military overseas, and residents in rural areas who rely on slower postal services.
Organizations including voting rights groups had pushed courts to preserve such extensions, saying they increase participation among populations that face logistical barriers to casting ballots on time. Democratic lawmakers have similarly backed measures allowing more time for mail ballots to arrive, arguing that no voter should be disenfranchised due to postal delays beyond their control.
"Election day deadlines should account for the realities of how people vote and how mail moves," said one voting rights attorney involved in similar cases, noting that extended receipt windows reflect the modern realities of postal service delivery times.
What the Numbers Show
Mississippi's law permits counting of mail-in ballots received up to five business days after Election Day, provided they bear a postmark from Election Day or earlier. The state is among roughly 20 that have some form of extended receipt deadline for absentee or mail voting.
According to data from the National Conference of State Legislatures, several states allow mail ballots to be counted if received within two to seven days after Election Day, with most requiring a pre-election postmark. The specific deadlines vary significantly by state, ranging from zero extra days in some jurisdictions to up to 10 days in others.
Turnout studies indicate that mail voting has increased substantially since 2020, with roughly 40 percent of all votes cast by mail in recent federal elections, up from around 25 percent in 2016. The share of mail ballots varies considerably by state, with western states and those with older populations tending to have higher mail-voting rates.
The Bottom Line
The Supreme Court's ruling provides clarity for Mississippi and states with similar laws heading into the 2026 midterms. States with extended receipt deadlines can continue using them without fear of federal preemption challenges, at least under current law.
Voting rights groups say they will monitor implementation to ensure election officials properly count eligible late-arriving ballots. Election security advocates say postmark requirements and signature verification still provide safeguards against abuse in the extended counting period.
The decision does not address whether Congress could enact stricter uniform standards for mail ballot receipt deadlines, a proposal that has been discussed but not advanced legislatively.