Whether the district court erred in preliminarily enjoining the military from implementing the Mattis policy nationwide

QUESTION PRESENTED In 2018, Secretary of Defense James Mattis announced a new policy concerning military service by transgender individuals. Under the Mattis policy, transgender individuals would be permitted to serve in the military, while individuals with a history of a medical condition called gender dysphoria would be disqualified from military service unless they meet certain conditions. The question presented is: Whether the district court erred in preliminarily enjoining the military from implementing the Mattis policy nationwide. ()