The Equal Rights Amendment, which would prohibit discrimination based on gender, was sent to the states for ratification in 1972. Congress set a deadline of 1979 for three-quarters of state legislatures to ratify the amendment, then extended it to 1982.

U.S. President Joe Biden called the Equal Rights Amendment "the law of the land," on Friday, backing an effort to enshrine the change into the U.S. Constitution even though it long ago failed to secure the approval of enough states to become an amendment.

Supporters say it is needed to protect against discrimination. Opponents argue the timetable to have it become part of the Constitution has passed.