A federal appeals court has invalidated Mississippi's law allowing mail-in ballots to be counted if received up to five days after Election Day, ruling that it conflicts with federal law that designates a singular day for elections. The decision, issued by the 5th U.S. Circuit Court of Appeals, emphasized that ballots must be both cast and received by Election Day, aligning with federal statutes. This ruling could significantly affect voting practices in other states with similar laws, although it does not immediately affect the upcoming election on November 5, as the court declined to block the law before the election. The case, backed by the Republican National Committee, could potentially escalate to the U.S. Supreme Court. The decision underscores ongoing legal battles over absentee ballot regulations, with implications for election procedures nationwide, and is seen as a victory for proponents of stricter election laws, highlighting concerns about election integrity and transparency.