Jonathan Turley: A Question of Power: The Imperial Presidency

http://www.informationclearinghouse.info/article38576.htm

To this day, many Americans misunderstand the separation of powers as simply a division of authority between three branches of government. In fact, it was intended as a protection not of institutional but of individual rights, by preventing any branch from assuming enough power to become tyrannical. No branch is supposed to have enough power to govern alone. Once power becomes concentrated in the hands of a president, citizens are left only with the assurance that such unchecked power will be used wisely – a Faustian bargain the framers repeatedly warned us never to accept.