Claim: The United States Congress has an upper chamber and a lower chamber.
Evidence: The United States Congress is the bicameral legislature of the federal government of the United States consisting of two chambers : the Senate and the House of Representatives.
The United States Senate is the upper chamber of the United States Congress which , along with the United States House of Representatives , the lower chamber , composes the legislature of the United States of America.
The United States House of Representatives is the lower chamber of the United States Congress which , along with the Senate , composes the legislature of the United States.