Legislative power is a body of persons having the power to legislate, specifically an organized body having the authority to make laws for a political unit. Parliament is the supreme legislative body of a usually major political unit that is a continuing institution comprising a series of individual assemblages. In addition to the parliamentary type of legislature found in parliamentary systems, there is a different type of legislature, which is called "congress". The use of congress to denote legislatures within separation-of-powers systems in general is justified by the policy-making focus of the primary activities they tend to pursue as well as the increased likelihood of a more conflictual relationship with the executive branch when compared to fused-power systems. Foreign policy is a policy regulating a particular country's relations with other states and peoples in the international arena. The objectives pursued by a state in its dealings with other states, and the methods and course of action used to pursue them. Foreign policy is the range of actions taken by varying sections of the government of a state in its relations with other bodies similarly acting on the international stage in order to advance the national interest. The author in this essay tries to explain the role of congress in nominating of American's foreign policy. It seems that executive power (specifically president) is dominated.