An amendment can be proposed by a two-thirds vote in each house of Congress and then ratified by three-fourths of the states in conventions called for that purpose. A national convention called by Congress at the request of two-thirds of the state legislatures may propose an amendment.
Article V of the Constitution specifies two procedures for proposing amendments to the document. Amendments may be proposed by the Congress, through a two-thirds vote on a joint resolution, or by a convention called by Congress in reaction to applications from two-thirds of state legislatures.
