Romney Hitting His Stride in Iowa, Nationally

Mitt Romney needs to fend off Ron Paul and Rick Santorum for big win in Iowa.
2:31 | 12/30/11

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Transcript for Romney Hitting His Stride in Iowa, Nationally
Your voice your vote T minus four days until the Iowa Caucuses. The GOP race is reaching fever pitch Mitt Romney's feeling confident as we enter the final weekend but some of his challenges are gaining ground in the final stretch. ABC's John Carlson -- -- -- with the very latest good morning to you John. Good morning Elizabeth it is down to the wire time here in Iowa and that means. A last -- frenzy of campaigning of lot of nasty ads as the candidates make the final push. Mitt Romney seems to be having the time of his life when -- crowd. -- -- -- -- -- After watching -- -- of his rivals prize at fault Romney finally seems to -- hitting his stride. He's up in Iowa and now the latest Gallup poll shows Romney tops nationally. It's almost enough to make -- wanna start singing I feel like breaking into 76 from bones but I will have. I will not do that right now I'm not that good of a singer. The biggest threats to Romney right now in Iowa part two overseen his fringe candidates just a few months ago we first there's Ron Paul and you're interested. Quirky libertarian who wants -- into the war in Afghanistan and slash government spending he said some of the most vicious. It's a story or smooth talking politicians. At 76 Paul is the oldest community by far. But he's the one who's caught fire with the youngest voters -- counting on hundreds of college student volunteers to help on caucus night but. And then there's Rick Santorum. This is election where. I believe the future of America hangs in the balance former senators picking up support from evangelical conservatives it has moved way up in the polls. Enough to now find that he is the one under attack. Santorum -- for a billion and earmarks until voters kicked him out of office of a landslide. Newt Gingrich has fallen so far so fast. He now says he'll be OKB comes in fourth in Iowa. He's been battered badly by -- negative -- but insists he will not hit back. Iowa could set. A totally new -- in politics. If the people who read the negative ads didn't get any votes and the votes only want to people who have been positive. And there's a new poll out this morning -- NBC Marist poll. It actually has Newt Gingrich falling all the -- to fifth place this -- was with once again puts Mitt Romney on top barely ahead of Ron Paul all right John thanks so much.

This transcript has been automatically generated and may not be 100% accurate.

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