Final answer:
The U.S. Constitution grants the president specific powers related to military command, foreign agreements, and war-waging authority.
Explanation:
The power given to the president by the U.S. Constitution includes being the commander-in-chief of the military, nominating executive officials and ambassadors, and negotiating foreign agreements and treaties.
Additionally, presidents can enter into executive agreements without Senate consent and have the authority to wage war for a limited time, as seen with the War Powers Resolution of 1973.
Overall, presidents have expanded war powers post-World War II, and their role in shaping foreign policy is significant.
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