This question refers to the Secretary of State as the president's chief diplomat and cabinet member. Other critical foreign policy roles to the presidency are the Secretary of Defense and National Security Advisor.
A chief foreign affairs adviser in an officer who works closely with the process in formulating foreign relations policy. He also advises the president on actions to take in dealing with a crisis overseas.
It's the President.
The president
the president and his chief advisers are the principal architects of U.S. foreign Policy.
chief diplomat
chief diplomat
Warren G. Harding - Domestic Policy
As the main author of American foreign policy, the President acts as the nation's chief diplomat, representing the United States in dealings with other countries and making key foreign policy decisions on behalf of the country.
chief diplomat
Chief Diplomat
chief adviser
The Commander in chief is the US President.One of the six major roles of the President of the United States is Chief Diplomat. As chief Diplomat, the President's job is to conduct foreign policy by directing the actions of American ambassadors and signing treaties and trade agreements with leaders of foreign nations