Congress, the legislative branch of the U.S. government, consists of the House of Representatives and the Senate. These two chambers work together to create laws, represent constituents, and oversee the executive branch, operating on a two-year cycle known as a session. The Constitution establishes Congress's powers and responsibilities, including making laws, declaring war, and regulating commerce. The bicameral structure balances representation, with the House representing people proportionally and the Senate representing states equally.