Columbia subject headings:
Executive power--United States--History.
Presidents--United States--History.
War and emergency powers--United States--History.
War and emergency powers--United States.
Harvard subject headings:
Executive power--United States--History
Presidents--United States--History
War and emergency powers--United States--History
Princeton subject headings:
Executive power--United States--History.
Presidents--United States--History.
War and emergency powers--United States--History.