Can you change your ballot after mailing it? US law says no.

Votebeat is a nonprofit news organization reporting on voting access and election administration across the U.S. Sign up for our free weekly newsletter to get the latest.When the U.S. Supreme Court last week took up the question of late-arriving mail ballots, the discussion turned to something more basic: when a vote becomes final.Justice Neil Gorsuch raised a hypothetical — whether a voter who has already mailed a ballot could change their mind and have a postal carrier cancel their delivery after learning new information about a candidate, even after Election Day.For Mississippi, the plaintiff in the case before the court, the answer was clear. The state’s Solicitor General Scott G. Stewart told the court that’s not possible there. Once a ballot is cast, it stays cast.The justices also spent significant time on the broader question of finality — whether voters ever get a second chance, or at least a way to undo a vote made too soon.In most states, they don’t, especially after a ballo