What is needed to change the Constitution?

To change the Constitution of the United States, an amendment must be proposed either by a two-thirds majority in both the House of Representatives and the Senate or by a convention called for by two-thirds of state legislatures. Once proposed, the amendment must then be ratified by three-fourths of the state legislatures or by conventions in three-fourths of the states. This rigorous process ensures that any changes reflect a broad consensus across the nation.