The legislative body of the United States government is called Congress, which is made up of two parts: the Senate and the House of Representatives. The House of Representatives is also known as the House, and the Senate is also known as the upper house. The legislative branch is responsible for making laws, declaring war, regulating interstate and foreign commerce, and controlling taxing and spending policies. Bills can be proposed by members of Congress, and if both the Senate and the House of Representatives pass the bill, it goes to the President for approval. If the President agrees, he or she can sign the bill, and it becomes law. If the President does not agree, he or she can veto it. If the President vetoes the bill, Congress can decide to vote again to override the veto.