Distilled to its essence, the “Compact” approach is unconstitutional because it seeks to change, through state legislative action (statutes and interstate compacts), the amendment procedure specified in Article V of the Constitution.
A one-page summary of the plan issued by the Compact campaign states its goal plainly: “Purpose—to greatly simplify the amendment process by combining all the steps required of the state legislature . . . ”
One problem with that is the U.S. Supreme Court has a different view. As the justices stated in the unanimous opinion in Hawke v. Smith, one of the Court’s most important Article V cases, “It is not the function of courts or legislative bodies, national or state, to alter the method which the Constitution has fixed.” There is little chance, therefore, that the “Compact” would survive a judicial challenge.