Separation of powers as a safeguard of federalism

With all the obvious flaws of delay, untidiness, and potential for abuse, w e have not yet found a better way to preserve freedom than by making the ex ercise of power subject to the carefully crafted restraints spelled out in the Constitution.(1) [T]he equal vote allowed to each State [in the Senate] is at once a constit utional recognition of the portion of sovereignty remaining in the individu al Stares and an instrument for preserving that residuary sovereignty.(2)