Domestically, the most significant fact about the NIE is its public manifestation. The White House was powerless to prevent publication of a document that made Bush aides unhappy and uncomfortable. The administration went along because it knew that the document -- and any attempt to suppress it -- would have been immediately leaked.
It is as if this administration has developed its own political version of Jimmy Carter's aborted project for a neutron bomb, which was intended to destroy people while sparing buildings. Bush consistently manages to destroy or damage goals he proclaims and friends who support him, while foes escape harm.