Congress, which consists of the House of Representatives and the Senate, is the legislative branch of government—its duty is to make the laws. Article I of the Constitution defines the structure and powers of Congress and how its members are elected. The composition of the two chambers—the House representing the people, and the Senate the states—resulted from the most important compromise made at the Constitutional Convention in 1787, and helped ensure the ratification of the Constitution.

From the constitution

Articles and amendments related to Congress.