There was little agreement over whether Hussein's capture would hurt Dean politically and, if so, whether Democratic primary voters would turn to a candidate who favored the war or one who opposed it. Private polling by one campaign last week showed Dean opening up a big lead in Iowa and holding on to his commanding lead in New Hampshire after his endorsement by former vice president Al Gore.
A new Washington Post-ABC News poll showed Dean ahead of his rivals nationally as well, favored by 20 percent of registered Democrats surveyed. Lieberman was second, at 12 percent, with no other candidate in double digits. Almost one-third of those surveyed said they were either undecided or liked none of the candidates. About two in 10 said Gore's endorsement made it more likely they would support Dean, while about one in 10 said the endorsement made it less likely.
http://www.washingtonpost.com/wp-dyn/articles/A2965-2003Dec15.html---------
Could not find the actual poll so it probably hasn't been released yet. Here is the breakdown of the candidates from the 10/26 poll:
Howard Dean 17
Richard Gephardt 14
Wesley Clark 14
Joseph Lieberman 13
John Kerry 8
Al Sharpton 7
John Edwards 5
Carol Moseley Braun 3
Dennis Kucinich 2
None (vol.) 5
Wouldn't vote (vol.) 1
No opinion 10
So according to the article Dean is up 3 and Lieberman is down 1. Gep and Clark have dropped at least 5.