On September 3, the U.S. Supreme Court asked the Republican National Committee and the Mississippi Libertarian Party to respond to the state’s Reply brief in Watson v Republican National Committee, 24-1260. This case involves the Mississippi law that says absentee postal ballots are valid if they arrive in the elections administration office by three days after election day. The Fifth Circuit, in a surprise ruling, had said that the 1872 federal law telling states to hold congressional elections in the first week of November actually means that all ballots must be in the hands of the election office by the end of election day.
If the Fifth Circuit is correct, that means that the laws of 48 states are invalid.
Generally, when a case is filed in the U.S. Supreme Court, asking the court to hear the case, there are never more than three rounds of briefs. First the losing side in the lower court asks the Court to hear the case. Then, sometimes, the side that won the case in the court below responds. Then, commonly, there is a Reply brief, and that is the end until the Court decides whether to hear the case or not. But in this case, the Court, having read three sets of briefs, wants a Reply to the Reply Brief. That is due October 3.