John McLean, Prigg v. Pennsylvania — Concurrence
“ May a state occupy a fragment of federal power which has not been exercised, and like a tenant at will, continue to occupy it until it shall have notice to quit? No such power is derived by implication from the federal constitution. It defines the powers of the general government, and imposes certain restrictions and duties on the states; but beyond this, it in no degree affects the powers of the states. The powers which belong to a state are exercised independently; in its sphere of sovereignty, it stands on an equality with the federal government, and is not subject to its control. ”
