Karl didn't say "Democrats", he said "liberals". And he didn't specify anyone in office.
BUT, if you're talking elected Democrats, we can start with Barbara Lee, who was the sole vote against the use-of-force authorization, Cynthia McKinney & John Conyers, who are among those Congressmen who spoke at ANSWER rallies, and Dennis "Let's start a Department of Peace!" Kucinich.
Even Bill Clinton, who at one time said he supported military action in Afghanistan and Iraq, repeatedly proclaimed out of the other side of his mouth that we needed to send more MONEY to these terrorist hotbeds all over the world, to eliminate the "need" for terrorism. Reknowned terrorist appeaser Jimmy Carter, no surprise, is also in favor of ending terrorism via massive transfers of wealth.
That's just off the top of my head. If I kick the old memory box housing for a while, I'm sure more names will come back to me.
And I am not even counting those crazy hard-left pacifists at the state and local levels. The ones who passed antiwar resolutions in late 2002 and early 2003. All I know is that it was out of their purview, and not what they were sent to office to do, yet they did it anyway.
And Chomsky. And the idiot city council at Berkley.