Just not anywhere in the top leadership. And I don't count Lieberman...the last Democrat I remember who unconditionally supported the war was Zell Miller, and that was back in 2004-2005.
Since then, any supporters have been as vocal as moderate muslims. They may be (and are) there, but we sure don't hear them.
Technically, Lieberman is an independent who caucuses with the Democrats. So he doesn’t count, and isn’t an unconditional supporter in any case, which you hint at.
I was thinking of Brian Baird, if you don’t count Lieberman.