Final answer:
The president can deploy troops for hostile purposes but needs to notify Congress within 48 hours and get congressional approval to maintain forces longer than 60 days, with a possibility of a 30-day extension for safe withdrawal.
Step-by-step explanation:
The question refers to the president's power to deploy troops and the requirement for congressional approval for such actions, which is a stipulation outlined in the War Powers Resolution of 1973. According to this law, the president may send the U.S. military into action abroad only by declaration of war by Congress, "statutory authorization," or in case of a "national emergency created by attack upon the United States, its territories or possessions, or its armed forces." Should the president deploy troops for hostile reasons, they must notify Congress within 48 hours of doing so. Additionally, unless Congress declares war or provides a specific authorization, the use of military forces must end within 60 days, though the president can extend the period for 30 days more to ensure a safe withdrawal of forces.