Who is primarily in charge of foreign affairs in the United States?

The role of handling foreign affairs in the United States primarily falls under the purview of the President. While the Secretary of State plays a crucial role as the President's chief foreign affairs adviser and represents the U.S. in diplomatic matters, the ultimate decision-making authority rests with the President. The Secretary of State carries out the President's foreign policy agenda, manages relations with other countries, and oversees the State Department, but it is the President who sets the overall direction and priorities in international relations. Other positions, like the National Security Advisor, advise on national security issues, but they do not have direct authority over foreign affairs in the same way that the President does.