This poll came out on Wed. right before the Culver - Judge announcement, so that is not included.
http://www.rasmussenreports.com/2006/State%20Polls/February%202006/Iowa%20Governor%20February.htm"There's been little change in Iowa since our last survey in the race to succeed Governor Tom Vilsack (D). As in January, Republican Congressman Jim Nussle is still neck and neck with Democrat Chet Culver, Iowa's Secretary of State, though Culver now nominally leads, 41% to 40%. Twelve percent (12%) of Iowa voters are unsure who they'd pick if the election were held today and Nussle and Culver were the major-party candidates; 7% would pick someone else. Nussle also maintains a several-point lead over Democrats Michael Blouin and Patty Judge. Nussle leads Blouin 41% to 36% and leads Judge 42% to 37%. But Democrat Ed Fallon, while still trailing, has picked up a bit. Nussle now leads Fallon 42% to 32%, whereas Fallon had trailed by 15 percentage points in January. "
Here is some analysis from Patriot Skull Face.
"There has been little movement among the "frontrunners."
Jim Nussle (R) 40%
Chet Culver (D) 41%
Jim Nussle (R) 41%
Michael Blouin (D) 36%
Jim Nussle (R) 42%
Patty Judge (D) 37%
Jim Nussle (R) 42%
Ed Fallon (D) 32%
This race is still tied.
Since January, Fallon seems to be the only one gaining much, as Culver has gained +1%, Blouin +2%, Judge +1%, and Fallon +5%.
http://patriotskullface.blogspot.com/2006/02/rasmussen-feb-poll-chet-leads-looking.html