Who's playing Edward?

As we await the start of caucusing in Iowa (in living color on C-SPAN!), an interesting metaphor from pollster John Zogby:

Perhaps the biggest problem that Clinton and her team never anticipated is that they, essentially, ended up running against both Jack Kennedy and Bobby Kennedy. Edwards (the Bobby) tapped into an anger that our polls measured in big numbers. His message is powerful for Democrats and I believe he will move on to New Hampshire. Obama has connected with young people and Iowans looking for hope and opportunity with an energetic message reminiscent of Jack Kennedy. Tomorrow this will still be a three-way race.