Final answer:
Congress has several powers to check the President concerning foreign policy, including treaty ratification, declaring actions unconstitutional, the power to declare war, and controlling funding through the power of the purse.
Step-by-step explanation:
The powers of Congress to check the President concerning foreign policy are primarily outlined in the Constitution. While the President can negotiate treaties, they must be ratified by the Senate for them to be binding on the United States. Additionally, Congress has the power to declare a president's actions unconstitutional and has the authority to officially declare war. Lastly, the power of the purse allows Congress to cut off funding for military ventures it does not approve.
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