I've started and stopped a few posts on the "Bush lied"/"Uranium/Niger" story and keep either getting sidetracked or bogged down in trying to link all the worthy items being written on the subject (from all sides). I've decided to link to this Daniel Drezner item and say "Indeed." (Very eloquent, if I may say so myself.)
OK, I can't resist linking to this David Brooks piece from a few weeks ago about the Democrats' creeping insanity:

Fury rarely wins elections. Rage rarely appeals to suburban moderates. And there is a mountain of evidence that the Democrats are now racing away from swing voters, who do not hate George Bush, and who, despite their qualms about the economy and certain policies, do not feel that the republic is being raped by vile and illegitimate marauders. The Democrats, indeed, look like they're turning into a domestic version of the Palestinians--a group so enraged at their perceived oppressors, and so caught up in their own victimization, that they behave in ways that are patently not in their self-interest, and that are almost guaranteed to perpetuate their suffering.
When you talk to Democratic strategists, you find they do have rationalizations for the current aggressive thrust. In 2003, it's necessary to soften Bush up with harsh attacks, some say. In 2004, we'll put on a happier face. Others argue that Democrats tried to appeal to moderate voters in 2002 and it didn't work. The key to victory in 2004 is riling up the liberal base. Still others say that with all the advantages Bush has--incumbency, victory in Iraq, the huge fundraising lead--Democrats simply have to roll the dice and behave radically.
But all of these explanations have a post-facto ring. Democratic strategists are trying to put a rational gloss on what is a visceral, unplanned, and emotional state of mind. Democrats may or may not be behaving intelligently, but they are behaving sincerely. Their statements are not the product of some Dick Morris-style strategic plan. This stuff wasn't focus-grouped. The Democrats are letting their inner selves out for a romp.