The Supreme Court's conservative majority on Monday sounded skeptical of state laws that allow the counting of late-arriving mail ballots, a persistent target of President Donald Trump.
A ruling, likely to come by late June, that bars counting ballots arriving after Election Day would send officials scrambling in 14 states and the District of Columbia, just a few months before the 2026 midterm congressional elections to change their ballot rules.
An additional 15 states that have more forgiving deadlines for ballots from military and overseas voters also could be affected.
The legal challenge is part of Trump’s broader offensive against most mail balloting, which he has said breeds fraud. Trump has repeatedly claimed that his loss to Joe Biden in 2020 resulted from fraud.
The court heard arguments in a case from Mississippi pitting the state against Trump's Republican administration and the Republican and Libertarian parties. At issue is whether federal law sets a single Election Day that requires ballots to be both cast by voters and received by state officials.
While there was no explicit reference to the 2020 election, several conservative justices gave voice to some of Trump's complaints. Justice Samuel Alito wondered about the appearance of fraud in situations where "a big stash of ballots" that arrive late "radically flipped" an election.
Defending the state law, Mississippi Solicitor General Scott Stewart pointed out that the Trump administration and its allies in the case have not documented instances of fraud due to late-arriving mail ballots.
The court's liberal justices indicated they would uphold state laws with post-Election Day deadlines.
"The people who should decide this issue are not the courts, but Congress, the states and Congress," Justice Sonia Sotomayor said.
Forcing states to change their practices just a few months before the election risks "confusion and disenfranchisement," especially in places that have had relaxed deadlines for years, state and big-city election officials told the court in a written filing.
California, Texas, New York and Illinois are among the states with post-Election Day deadlines. Alaska, with its vast distances and often unpredictable weather, also counts late-arriving ballots.
Alaska elections officials said Monday they are preparing for the fall elections under existing law. "If a ruling requires operational changes, we will work through those in coordination with the appropriate state entities to ensure compliance and to provide clear information to voters," the Alaska Division of Elections said in a statement.
Lawyers for the Republican and Libertarian parties, as well as Trump's administration, are asking the justices to affirm an appellate ruling that struck down a Mississippi law allowing ballots to be counted if they arrive within five business days of the election and are postmarked by Election Day.
Paul Clement, representing the political parties, played on fears of fraud by invoking Democrat-dominated Chicago, infamous for election shenanigans. Voting ends at 8 p.m. in Chicago, Clement said, but state law allows ballots postmarked by Election Day to be received later.
A voter paying close attention to the election returns could in theory try to swing the election by submitting a mailed ballot to the post office after the polls were closed, he said.
"I am not here to say there could ever be voting fraud in Chicago," Clement said to laughter in the courtroom.rm.
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