Understanding the American government.

Victor Davis Hanson explains:

The president establishes American foreign policy and is commander in chief. At least that’s what the Constitution states. Then Congress oversees the president’s policies by either granting or withholding money to carry them out — in addition to approving treaties and authorizing war.

Apparently, the founding fathers were worried about dozens of renegade congressional leaders and committees speaking on behalf of the United States and opportunistically freelancing with foreign leaders.

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...recently hundreds in Congress have decided that they’re better suited to handle international affairs than the State Department.
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Partisan politics often drive these anti-administration foreign policies, aimed at making the president look weak abroad and embarrassed at home.
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Congress should stick to its constitutional mandate and quit the publicity gestures.

American government foreign policy State Department Congress President Victor Davis Hanson