Beyond making some amiably assorted stabs at speaking Spanish, the Democratic presidential candidates were united in their first major debate on at least one thing, resolutely targeting President Bush for his foundering postwar policy in Iraq. The clownish intramural sideshows that usually haunt the Democratic Party on the early primary circuit were missing in Albuquerque. But those Americans bothering to tune in on Thursday night were also offered an early look at how the Democrats disagree. While they competed to come up with the most dismissive description of Mr. Bush's foreign policy (Richard Gephardt may have won with "miserable failure"),...