East Des Moines, Iowa -- By local weather standards, it's a great Sunday morning. Bitter cold but no snow and no wind. And Alise Roderer, a young field organizer for the John Edwards campaign, is brightly encouraged by the tentative sunlight. Yesterday her volunteer canvass teams knocked on a thousand local doors. Today she hopes for the same.
"It's really, really important that you stress to the undecided that John Edwards is the most electable Democrat," she says to about 25...
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