SOVEREIGN. A chief ruler with supreme power; one possessing sovereignty. (q. v.) It is also applied to a king or other magistrate with limited powers.
2. In the United States the sovereignty resides in the body of the people. Vide Rutherf. Inst. 282.
I'll even toss in my state's Constitution Article I Section I to show that the people have sovereignty while the government does not.
Section 1. That all political power is vested in and derived from the people; that all government of right originates from the people, is founded upon their will only, and is instituted solely for the good of the whole.
The Citizens of each State shall be entitled to all Privileges and Immunities of Citizens in the several States.
Since this does bring up the privileges and immunities of the citizens I can bring in Missouri's Article I Section I Clause II into this since it's applied to all citizens from other states.
Section 2. That all constitutional government is intended to promote the general welfare of the people; that all persons have a natural right to life, liberty, the pursuit of happiness and the enjoyment of the gains of their own industry; that all persons are created equal and are entitled to equal rights and opportunity under the law; that to give security to these things is the principal office of government, and that when government does not confer this security, it fails in its chief design.
By the government blocking the rights of the sovereigns from suing a foreign citizen they are denying the sovereign citizen of their equal rights and opportunity under the law and the government has failed to do what it was designed to do in its chief design. Everyone has the right to sue others in the court of law.