NPR News Now covers the closing of the Republican National Convention in Dallas, where VP JD Vance delivered a keynote urging voters to reject "radicals" and "bureaucrats." The report also details a federal appeals court blocking USPS changes that could disrupt mail-in voting, as the Supreme Court prepares to weigh in. Other stories include two measles-related infant deaths in Pennsylvania, stock market declines following a spike in oil prices, and McClatchy Media laying off journalists nationwide.