Which branch of government affects foreign policy the most

The Senate plays a unique role in U.S. international relations. The Constitution authorizes the president to make treaties, but the president must then submit them to the Senate for its approval by a two-thirds vote. ... The State Department formulates and implements the president's foreign policy.

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answer; (d) one tectonic plate plunges beneath another; (most common,convergent boundaries)

answer; genetics;