State Department
            
        
            
    
    
                
            It is the lead U.S foreign affairs agency. It advances U.S. objectives and interests in shaping a freer, more secure, and more prosperous world through formulating, representing, and implementing the President's foreign policy. The Secetary of Stat, the ranking member of the Cabinet and fourth in line of presidential succession, is the President's principal adviser on foreign policy and the person chiefly responsible for U.S representation abroad.