CONSTITUTION OF THE UNITED STATES OF AMERICA; THE UNITED STATES SHALL GUARANTEE TO EVERY STATE IN THIS UNION A REPUBLICAN FORM OF GOVERNMENT, AND SHALL PROTECT EACH OF THEM AGAINST INVASION; AND ON APPLICATION OF THE LEGISLATURE, OR OF THE EXECUTIVE (WHEN THE LEGISLATURE CANNOT BE CONVENED) AGAINST DOMESTIC VIOLENCE. ARTICLE 4; What Biden is allowing to happen on our southern border is a direct violation of Article 4.