... to the residuary sovereignty of the States, ...
RESID''UARY, a. [L. residuus. See Reside.]
Pertaining to the residue or part remaining; as the residuary advantage of an estate.
The above definition form the Websters 1828
Sorry Hugh. The States were not sole
sovereigns. All your disagreeing will not change the fact of shared (or dual, if you like) sovereignty. The very quote you use (Federalist #43), tells you this.