What area of Iowa did you canvass? A few weeks ago I canvassed in Dubuque, and most voters were either Undecided or Edwards supporters, with a few steadfast Clinton supporters... Most of the voters "Undecided" voters, if they did mention a preference of the 3, said it was between Edwards/Obama. A lot of these people either A. Won't Caucus or B. Will be out of town, so you never know exactly how this will turn out.
I am familiar with Dubuque. Went to Loras College.
Kerry kicked Edwards' butt in Dubuque last time around. It was certainly not an Edwards stronghold.
I would imagine the emphasize on social justice issues and health care are a big plus for Edwards, particularly in that part of the state.