<P> Subject to the advice and consent role of the U.S. Senate , the President of the United States negotiates treaties with foreign nations , but treaties enter into force if ratified by two - thirds of the Senate . The President is also Commander in Chief of the United States Armed Forces , and as such has broad authority over the armed forces . Both the Secretary of State and ambassadors are appointed by the President , with the advice and consent of the Senate . The United States Secretary of State acts similarly to a foreign minister and under Executive leadership is the primary conductor of state - to - state diplomacy . </P>
what role does the president play in foreign affairs
negotiates treaties with foreign nations Commander in Chief of the United States Armed Forces Both the Secretary of State and ambassadors are appointed by the President