"This balance between the National and State governments ought to be dwelt on with peculiar attention, as it is of the utmost importance. It forms a double security to the people. If one encroaches on their rights they will find a powerful protection in the other. Indeed, they will both be prevented from overpassing their constitutional limits by a certain rivalship, which will ever subsist between them."
-- Alexander Hamilton, speech to the New York Ratifying Convention, 1788