The other fact remains, that to engage in war, democratic nations have historically required there to be either: a. an actual and ongoing attack on your own soil or the soil of your allies or, b. an imminent threat of attack whereby inaction (almost) guarantees an actual attack. Even if WMDs had been found, neither condition existed. There mere possession of weapons is not sufficient cause to presume the effect of attack (if it were, every nation would be attacking each other as we speak.) The fact that no weapons have been found, and are now admittedly not going to be found, makes the case for war not only weaker (not stronger as this thread stated) but makes this war unbelievably immoral.
If this current circumstance continues unchecked, the world is allowing a very dangerous precedent to be set among democratic nations. At the very least, Bush needs to recant, hastily, much of what he has claimed to be true, rather than increase his defensive stance on the issue. Of course, doing so would cost him an election, but failure to do so will be much more costly in the long run.