This state department org chart provides an overview of the Department of State's organization. The Executive Branch and Congress are both constitutionally responsible for US foreign policy. The Department of State is the lead U.S. foreign affairs agency within the Executive Branch, and the Secretary of State serves as the President's primary foreign policy adviser. Through its primary role in developing and implementing the President's foreign policy, the Department advances US objectives and interests in shaping a freer, more secure, and prosperous world. The Department also assists other US Government entities, such as the Department of Commerce and the US Agency for International Development, with their foreign affairs activities. The state department org chart also provides various vital services to US citizens and residents.