Politico examines Robert F. Kennedy Jr.'s handling of America's measles epidemic as Pan American Health Organization officials weigh this week whether the United States still deserves its measles-elimination status, held since 2000. More than 7,000 infections have been reported since January 2025, kindergartener vaccination coverage has slipped to 92.4% since Kennedy took over, and the article argues his legacy and future ambitions hang on the outcome.