The Supreme Court has ruled against a challenge brought by the Republican National Committee (RNC) regarding the counting of mail-in ballots. The decision allows states to continue counting ballots arriving after Election Day, provided they were mailed before the deadline. This ruling effectively maintains existing state laws concerning late-arriving ballots. The RNC argued that such ballots should not be counted, citing potential for fraud and disruption to the election process. However, the Court did not issue a formal opinion, indicating a lack of consensus on the broader legal issues. This decision impacts future elections where mail-in voting is prevalent, offering clarity to election officials and voters. The ruling leaves the specifics of implementation to individual states.