The rise of the presidency began with the Louisiana Purchase, which in 1803 doubled the land mass of the United States. History taught the framers that, just as Rome changed from republic to empire with conquest of new lands, territorial acquisition would lead to the centralization of political power.

We often imagine that the court serves as a sort of neutral umpire controlling the warring political branches. But this is mostly myth. The justices of the Supreme Court are themselves actors in the struggle for power, and when they intervene, they think carefully about how their decisions will affect the court's own legitimacy and authority.

The administration of George W. Bush, emboldened by the Sept. 11 attacks and the backing of a Republican Congress, has sought to further extend presidential power over national security. Most of the expansion has taken place in secret, making Congressional or judicial supervision particularly difficult.

Noah Feldman Quotes