The United States are a federal republic. The national government is divided up into smaller units called states. Although the states have some autonomy, the national government is the final authority. The national government consists of three branches, the legislative, the judicial, and the executive. The president and his/her advisers are part of the executive branch. The legislative branch consists of Congress. It has two sections: the Senate, and the House of Representatives. The Supreme Court, as well as other federal courts, make up the judicial branch.