Marc Ambinder makes a good case. And anecdotally, I'd back him up. I'm definitely noticing a sharp uptick in anti-Edwards stories that Obama people are trying to sell me on, which suggests he's being seen as a threat, after being ignored for many months. Indeed, my take on the dynamics of the primary right now is that the Clinton camp feels they can lose to Edwards in Iowa, but not to Obama. Obama's got too much potential strength in New Hampshire and South Carolina, so an Iowa win could slingshot him straight to the nomination. So if they continue to feel that Hillary is likely to lose the Caucus, their focus becomes keeping Obama from winning. If that means blasting him so hard that their numbers dip a bit and Edwards takes Iowa, so be it.
