The actual implementation of foreign policy is primarily the responsibility of the president, who exercises executive powers to engage in international relations and make significant decisions. While executive agencies and the armed forces assist, Congress contributes through funding and legislation but does not carry out foreign policy itself. Historical examples, such as President Kennedy during the Cuban Missile Crisis, illustrate the president's central role in this process.
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The implementation of foreign policy primarily falls to the president, who has the power to engage in international relations directly. Although executive agencies and Congress play supporting roles, it is the president who ultimately carries out foreign policy actions. Examples include historical decisions made by presidents during significant global events. ;