The primary body responsible for creating laws in the United States is the Congress, which consists of two chambers: the House of Representatives and the Senate. Congress has the authority to legislate on a wide range of issues, including taxation, healthcare, and national defense. Bills can be introduced by members of either chamber and must undergo a rigorous process of debate, amendment, and approval before becoming law. This law-making power is a fundamental aspect of the U.S. government, reflecting the principles of republican governance and representation.