Insider Advantage has released their first poll of the Iowa caucuses. Like their South Carolina polls that show Obama leading, this survey also differentiates itself from other polls in the state, except by showing Edwards in the lead:
Insider Advantage Iowa poll, 12/16-17, 977 LVs, no trendlines
Edwards: 30%
Clinton: 26% (fixed)
Obama: 24% (fixed)
Other: 12%
Unsure: 7%
Why is this survey more favorable to Edwards? It could be because of an Edwards surge, but it could also be the result of the poll projecting that only one in eight caucus goers will be under the age of 45. Not only is that wildly inconsistent with 2004 entrance survey results for Iowa which indicated one in three caucus goers were under the page of 45, but it is also certain to drag down Obama's numbers given that he has consistently performed well among younger voters.
Edwards dominates second-place and undecided voters. When poll participants were forced to choose between Clinton, Edwards and Obama, Edwards moved into a commanding 42%--29%--28% lead. Two-thirds of undecided voters and supporters of other candidates broke in favor of Edwards. While other polls have shown Edwards ahead or tied among second-place choices, no poll has shown him with such a crushing advantage. If he picks up two-thirds of second-choices and undecideds, then he will easily win Iowa. Right now, however, this poll appears to be an outlier.
They survey is also different from other Iowa polls in that it shows Edwards performing worse among the most likely voters. That doesn't matter to me, however, since I don't include any of the likely voter screens in my polling average. Not only do I not trust most likely voter screens for Iowa, but in 2004, the "all voters" surveys were more accurate than the "likely voter" surveys.
The five-poll average in Iowa currently stands at Obama 28.6%, Clinton 26.2%, and Edwards 24.4%. It seems to me that all of the top three can finish first, second or third right now. On the Republican side, the Insider Advantage poll is also an outlier, showing Huckabee with only 2% lead on Romney. Among the most likely voters, Romney actually leads. Were that it were true! Amusingly, Giuliani is in 6th place among both types of voters.
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