the air, the evidence is pouring in, that presidential debate last week was a game changer. At least for now. Here's the newest poll. For the first time governor mitt romney pulling ahead leaving... See More
the air, the evidence is pouring in, that presidential debate last week was a game changer. At least for now. Here's the newest poll. For the first time governor mitt romney pulling ahead leaving president obama among likely voters. The president is under pressure tonight so what are his plans to turn this around? 29 days to go before americans head to the polls, it's "your voice, your vote," and abc's jake tapper has been working the phones talking to campaign insiders. He's at the white house. Jake? Reporter: Good evening, diane. Well, the obama campaign's official line is that the president's debate performance did not change the fundamentals of the race, but behind the scenes with that new poll, some top democrats are getting nervous and say the pressure is on vice president biden. President obama's sending a message to his supporters about last week's debate disaster. He gets it. Here he is at a los angeles fund-raiser praising the opening performer. They just performed flawlessly night after night. I can't always say the same. Reporter: In the last few days the pundits have been vicious and the comics no kinder. Whether "the new yorker's" cover or "saturday night live." Mr. President, governor romney has just said that he killed osama bin laden. Would you care to respond? No, you two go ahead. Reporter: A new gallup poll shows they believe romney did the superior job. 72% to obama's 20%. Incumbent presidents from confrontations often stumgle as did president ronald reagan in '84. I did avoid I'm afraid in my previous answer also. Reporter: President obama seemed to have initially thought it went well. This was a terrific debate. Reporter: Quickly he talked to aides and realized he had not brought his "a" game. This is on me he later told top advisers and since then he's been studying the video of that night with the goal of a more energetic and crisp performance. While the obama campaign dismisses it other top democrats say pressure is now on vice president biden, a win by congressman paul ryan could create a dynamic of energized challengers squaring off against tired incumbents. And, diane, vice president biden is in debate prep holed off in a delaware hotel reading the book that ryan co-authored contract young guns" and practicing the attack lines the president did not use. There is more room for vice presidential candidates to use those attack lines because their approval ratings do not matter as much.
This transcript has been automatically generated and may not be 100% accurate.