I just looked at the full poll results, and the real interesting story is on the Democratic side, where Obama has gained 7 points since the last poll to pull into a statistical tie with Clinton (he trails 28.9 percent to 26.6 percent), while Edwards dropped by 6 points. When I was in Iowa, the sense I got was that a lot of people still liked Edwards, but were also sensing that he didn’t have what it takes to win. If his voters begin to rally around Obama as the anti-Hillary candidate, and Obama is able to pull off a victory in Iowa, it’s the one thing that has the potential to shake up things on the Democratic side at this point. Clinton would still be favored to win the nomination even if she were to lose Iowa, but it would turn the race into a real battle rather than a repeat of Tyson vs. Spinks. In other findings, about 58 percent of Democrats are very or somewhat likely to change their minds, while about 69 percent of Republicans could shift their support.