Legally, sure, effectively being a function of force of arms, or will. Lacking that, and it's lacking, a rather silly concept.
And Texas v. White resolved the matter legally, if there was any doubt.
Article 3 of the Constitution requires controversies be resolved at the Supreme Court. Of course federal legislation or amendment would be other ways that could resolve some issues. You don’t get to avoid the requirement to resolve controversies in court by declaring that you don’t want to.