In the United States, a constitutional amendment must receive two-thirds of the votes in Congress.

Supermajority votes in the House and Senate are required, as well as ratification by 3/4 of the states. This is how legislation of an amendment occurs.

The formal amendment process, to the Constitution, requires a supermajority vote in the Senate, and consent (agreement) by three fourths of the states. This process involves most of the U.S., and is, therefore, a federal process. No state, acting alone can change or amend the Constitution (and, therefore, 'states rights' do not apply here).

A majority typically refers to more than 50% of the total votes or participants, while a supermajority requires a higher threshold, often set at two-thirds or three-fourths of the votes or participants. Supermajority requirements are usually used for important decisions that require broader consensus among members or stakeholders.

Whenever 2/3 of the House of Representatives agree. Article 5