Two big new national polls, by CNN, and by CBS/New York Times, show Mike Huckabee now challenging Rudy Giuliani for the national GOP lead.

Think about that for a minute. Huckabee has run no broadcast ads outside Iowa, and precious few even there. He's barely campaigned outside Iowa. So aside from his televised debate appearances, and whatever random direct mail a GOP voter may have received, his national support levels pretty much have to be based on news coverage of his campaign in Iowa.

There's a quadrennial debate in political circles about the size and nature of the "Iowa Bounce," the later benefit a candidate receives for winning or exceeding expectations in Iowa. But what we seem to be witnessing here is an Iowa "Pre-Bounce," based on perceptions that a candidate's doing well in Iowa. Stands to reason that the actual, post-Caucus "Bounce" should be even bigger, eh?

And that, my friends, should be as disturbing to the campaign of Rudy "I Can Ignore Iowa" Giuliani as Huckabee's sudden second-place national standing.