The Amendment Process is the method by which changes can be made to the United States Constitution. To propose an amendment, either two-thirds of both houses of Congress must agree, or a national convention can be called by two-thirds of state legislatures. Once proposed, an amendment must be ratified by three-fourths of the state legislatures or by conventions in three-fourths of the states. This process ensures that any changes to the Constitution reflect a broad consensus among both federal and state representatives.