president obama and governor mitt romney are preparing to head into the arena for their second big debate. And both men are on the ground just outside new york city. They know the power of one night... See More
president obama and governor mitt romney are preparing to head into the arena for their second big debate. And both men are on the ground just outside new york city. They know the power of one night in this race. Look at this. You can see it right there after the first debate, a dramatic change. That surge for mitt romney. Now just three weeks remaining, 21 days until americans go to the polls. It is "your voice, your vote" and our team is on the ground at hofstra university in new york, so let's start with abc's jake tapper and what the president is going to bring tonight, jake. Reporter: Good evening, diane. Well, campaign sources for both campaigns tell me that romney and obama have rehearsed for this potentially tricky town hall format with aides throwing them random questions jumping from topic to topic looking for ways to bond with the undecided voters who will make up the audience in this theater in the round behind me. Reporter: At a williamsburg resort president obama put on a confident face between a workout and a 45-minute debate prep. How do you feel about tonight? I feel fabulous. Reporter: What are you going to say? Then he ignored a question about the attack on diplomatic post in beng ghazi, libya. A smile cannot be your umbrella in every storm. He knows he has to step it up. Momentum in polls is with mitt romney. Is it possible you handed him the election that night? No. You're going to win. Yes. Reporter: Romney held debate prep before flying to ronkonkoma. He leads in some polls. What a difference two weeks can make in the world of politics. Before the first debate, those key independent voters thought obama would win the debate. Today more independents expect romney to win tonight. Back then romney sounded a bit more sheepish. You know, I've never been in a presidential debate like this and it'll be a new experience. The president is obviously a very eloquent gifted speaker. He'll do just fine. Reporter: And now -- this has been an interesting ten days or so. I had a debate about a week ago. I enjoyed that a great deal. I got to be honest with you. Reporter: Before departing for hofstra university the president held one more debate prep and spent time with friends and with first lady michelle obama had steak and potatoes romn. Romney had potatoes to with his wife ann and five sons. The unemployment rate is now under 8% for the first time in years. In addition, mitt romney seems to be casting himself as a more moderate candidate.
This transcript has been automatically generated and may not be 100% accurate.