TAPPER: And one of the things that I -- when I was out in Iowa a few weeks ago that I heard from Iowa Republicans is that the most important thing for them was they wanted to beat Barack Obama. That was the top priority.
But how do you reconcile the idea that, according to the Des Moines Register poll, almost half of the would-be attendees at the Iowa caucuses think that Mitt Romney would be the strongest opponent, and yet his support is less than half of that? They think he is the most electable, but they -- they just don't buy him for some reason?
HENDERSON: Well, I think there's a difference between those voters who vote with their head and those who vote with their heart. And I think that particular statistic drives the nail on that point.
The other thing about turnout, when you look at 41 percent of the people who responded, of likely caucusgoers in that Des Moines Register poll said that they were, you know, convincible, they might vote for someone else on caucus night.
I think the real thing for turnout at the caucuses is, if they don't reach 2008 levels, that will show us something which all Republicans have been talking about, that there's no enthusiasm, whereas Republicans like Governor Branstad has been indicating that, you know, Iowa Republicans are so enthusiastic to replace Barack Obama. If among those 41 percent of people who say they're convincible, they might vote for someone else, if they just stay home because they're not interested in a candidate, I think that will be a really huge indicator about the Republican race in general and how enthusiastic Republicans are about this 2012 race.
TAPPER: All right. We're down to the wire here. One word, your prediction. Kay?
TAPPER: Jon? KARL: I'll go Santorum.
TAPPER: All right, thanks so much, and happy new year.
Up next, "Next Week in Politics," your cheat sheet to the Iowa endgame and beyond.
TAPPER: Brace yourself for a busy few days as voting finally begins. Here's a look at what to expect next week in politics.
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TAPPER (voice-over): The Iowa caucuses arrive Tuesday, and the Republican candidates are making their final push, campaigning throughout the state. Frontrunner Mitt Romney rallies in Davenport and Dubuque on Monday, while Senator Rand Paul joins his father, Ron Paul, on the campaign trail, making stops in Des Moines and Cedar Falls.
After the caucuses that night, the Iowa survivors club will move on to Live Free or Die state, New Hampshire, where they will try to woo voters before the January 10th primary.
Except Rick Perry will head straight to South Carolina, making two stops in Aiken County Wednesday afternoon.
The remaining GOP field meets Saturday night in Manchester for the ABC News-New Hampshire debate, moderated by Diane Sawyer and George Stephanopoulos. It begins at 9 p.m. Eastern, 6 p.m. Pacific.
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TAPPER: And we'll be right back.
TAPPER: And now, "In Memoriam."
This week, the Pentagon released the names of six servicemembers killed in Afghanistan.
We'll be right back.
TAPPER: And that is our program for today. Be sure to tune in next Saturday, when Diane Sawyer and George Stephanopoulos moderate the ABC News Republican presidential debate live from Manchester, New Hampshire, at 9 p.m. Eastern.
And next Sunday, George Stephanopoulos returns to "This Week," taking over this broadcast as we plunge into this exciting election year.
For all of us here, thanks for watching. Happy new year. We'll see you next week.