On the assumption that Congress or a court would have been cooperative in September 2001, and that the cooperation could have kept necessary actions clearly lawful without conferring any benefit on the nation's enemies, the president's decision to authorize the NSA's surveillance without the complicity of a court or Congress was a mistake. Perhaps one caused by this administration's almost metabolic urge to keep Congress unnecessarily distant and hence disgruntled.

Charles de Gaulle, a profound conservative, said of another such, Otto von Bismarck -- de Gaulle was thinking of Bismarck not pressing his advantage in 1870 in the Franco-Prussian War -- that genius sometimes consists of knowing when to stop. In peace and in war, but especially in the latter, presidents have pressed their institutional advantages to expand their powers to act without Congress. This president might look for occasions to stop pressing.