The Supreme Court this morning, in Watson v. Republican National Committee, ruled that states are not barred by federal law from counting ballots that arrive after Election Day. The Court’s 5–4 opinion, written by Justice Amy Coney Barrett, upheld a Mississippi law allowing ballots to be counted if they arrived five days after the election. The law’s challengers argued that the federal Election Day statutes require the election to be completed no later than the day set by Congress for the election. The decision is a win for federalism, and its sweep is narrow, but it is nonetheless a loss ...