When the Supreme Court agreed to hear Watson v. Republican National Committee earlier this year, election integrity advocates had reason for cautious optimism. The case presented a clean legal question: does the federal law establishing Election Day require ballots to be received by that date, or merely cast? On Monday, in a 5-4 decision authored by Justice Amy Coney Barrett, the Court answered that question in a way few conservatives anticipated—and the consequences will extend well beyond Mississippi. . .
