They declared war (not by congress) on terror and we fought a war in the Middle East which we shouldn't have done because we more or less lost. 
        
                    
             
        
        
        
By the given statement in question, Truman wanted to imply that the effect of communism was growing and if it could not be checked by aiding such countries as Greece and Turkey, then it would have far reaching effects. Truman feared that communism would slowly grip these countries in financial trouble and spread to the Latin American countries and the countries in the East at a very fast rate. 
        
             
        
        
        
The word that best fills in the gap is "Cabinet"
Cabinet-level federal departments, currently made up of 15 executive departments <span>was established in Article II, Section 2 of the United States Constitution. These departments answer directly to the United States President.</span>