But opponents of the amendments said that the arguments used to defeat the federal amendment would also prevail in the states.

There are likewise competing versions of the proposed federal amendment.

But the groups differ on how supportive they expect top lawmakers to be of a federal constitutional amendment.

Most of the groups supporting the proposed federal constitutional amendment concede that it appears all but dead in Congress for this election year.

In advocating for a federal amendment to assure women the ballot, the National relied on a natural rights argument.

In 1966, another federal amendment was made expanding local air pollution control programs.