How long can the President keep deployed troops without Congressional approval?

The President can deploy troops without Congressional approval for up to 60 days due to the War Powers Resolution of 1973. This law was enacted to check the President's power to commit the United States to armed conflict without the consent of Congress. Following the initial 60 days, the President is required to notify Congress, and if military action continues beyond that period, Congress must grant authorization for any further military engagement. This mechanism is designed to ensure that there is oversight regarding the use of military force, reflecting the balance of power intended in the U.S. government's structure. This understanding of the War Powers Resolution is crucial for grasping the limits and responsibilities of the Executive Branch in matters of military engagement.