Edwards is showing signs of a break-out. 2nd or 3rd in Iowa is possible. Clark can ill afford to have a split in the Southern vote, particularly for SC, and particularly since Edwards is so damn likeable.
Watch it, Clark... Edwards is in your rearview... I imagine he can even hear his steps, now.
Edwards is also Dean's biggest threat at this point.
I have always said Edwards is completely underestimated. He is the only candidate that hasn't run a "copy Dean" campaign (well, excluding Lieberman). His strategy has always been built around a late breakout, and he is doing that in Iowa.