Do Edwards voters go to Clinton or Obama?

edwardsPolitical commentators seem unsure about whether John Edwards’ departure benefits Hillary Clinton or Barack Obama more.

Charlie Cook of the Cook Political Report argues that it could go either way: “While one can plausibly argue that Edwards’ withdrawal may unite the anti-Clinton vote, one can also argue that Edwards’ overwhelmingly white bloc of supporters . . . might behave much as other white Democrats have done in the contests after Iowa, not vote for Obama. I don’t know which of those arguments will prevail.”