The Supreme Court rules 5-4 that Mississippi can count mail ballots postmarked by Election Day if they arrive within five days.Justice Amy Coney Barrett writes the majority opinion, joined by Chief Justice John Roberts and three liberal justices.The court rejects a challenge led by Donald Trump and the Republican National Committee that sought to end state grace periods.The decision preserves practices in at least 14 states and the District of Columbia, spares election officials changes before the midterms, and follows a mixed record in lower courts.