Do states ratify amendments

The method of ratification is decided by the body that passes the amendment, which historically has been the US Congress (by 2/3 vote of both houses).

In all but one case, the approved amendments were ratified by state legislatures.

However, the language of the 21st Amendment (1933) specified its passage by state conventions rather than state legislatures. This was particularly chosen to avoid opposition by the same groups that had successfully lobbied for the passage of the 18th Amendment (Prohibition, 1920) which the 21st Amendment repealed.

* Should a national constitutional convention (Article V Convention) successfully be called, it too would be empowered to specify the means by which any of its proposed amendments would be ratified.