During oral arguments on March 23 in Watson v. Republican National Committee, a conservative Supreme Court majority expressed strong skepticism toward Mississippi's law allowing mail-in ballots postmarked by Election Day but received days later to be counted, citing federal statutes establishing Election Day as the uniform deadline for federal elections. Justices questioned grace periods used in states like California, which accepts ballots up to seven days post-election, potentially preempted by national law. This apparent judicial lean has driven trader consensus to an 81% implied probability for SCOTUS barring such practices, reflecting concerns over election uniformity and integrity ahead of a decision expected by summer amid ongoing litigation in multiple states.