My Conversation with David Yepsen of the Des Moines Register on the Iowa Caucuses

I just had a conversation with David Yepsen, columnist for the Des Moines Register and a long-time observer of the Iowa caucuses. Here is what he had to say about the reasons behind Obama's momentum and what a loss in Iowa could mean for the leading Democratic candidates.

The entire conversation will be broadcast tonight on your local PBS station.

You can see it tomorrow on the Charlie Rose website.