"Over the past year we've asked about 30,000 MoveOn members each week to tell us who they favored in the Democratic primary. It wasn't a binding vote, but here is what they said:"
The graph shows Edwards, Obama, Clinton, Kucinich neck-in-neck, very close, though in that order, with Edwards slightly ahead. The other candidates (Richardson, etc.) are far far below the Big Four.
MoveOn says they will continue to poll after the Iowa primaries, and if any candidate really and truly pulls ahead in the eyes of MoveOn members, they will then "launch a more formal endorsement process with a vote."