The Constitution provides that an amendment may be proposed either by the Congress with a two-thirds majority vote in both the House of Representatives and ปั้มโหวต the Senate or by a constitutional convention called for by two-thirds of the State legislatures. None of the 27 amendments to the Constitution have been proposed by constitutional convention.

The Congress proposes an amendment in the form of a joint resolution. Since the President does not have a constitutional role in the amendment process, the joint resolution does not go to the White House for signature or approval.

A proposed amendment becomes part of the Constitution as soon as it is ratified by three-fourths of the States (38 of 50 States).