Thank you so much tonight. Now we turn to countdown to the first big debate. 24 hours until the candidates face reach other on the stage. President barack obama and governor mitt romney both in... See More
Thank you so much tonight. Now we turn to countdown to the first big debate. 24 hours until the candidates face reach other on the stage. President barack obama and governor mitt romney both in marathon training sessions. Their wives and running mates carrying the banners today with mixed results. 35 days to go. "Your voice, your vote." David muir and jake tapper are back. Inside the debate hall, david muir. Jake, start us off. Reporter: Good evening, diane. The two kentds largely kept to themselves today. Leaving the hard work of ca campaigning to their surrogates. Not always staying on message. In battleground state north carolina, the vice president tried to assail the republican ticket but he did so in way that brought fire upon himself. How they can justify raising taxes on the middle class that's been buried the last four years. Reporter: Paul ryan pounced. Vice president biden, just today, said that the middle class over the last four years has been quote buried. We agree. That means we need to stop digging by electing mitt romney as the next president of the united states. Reporter: The vice president later said that the middle class pain was due to bush policipolicies. The debate symbolizes a problem for the president. The economic collapse happened under bush, but four years later, families are still hurting. Many in the middle class are barely treading water. All fodder for tomorrow night's debate in denver. The first lady is make her way there. First she stopped in ohio. Where early voting began today. Are we going sit back and watch everything we worked for and fought for to just slip way? Reporter: Ann romney got to colorado before her. We have a debate comes up. We're excited about that. We're focused. Reporter: Family members' nerves are on edge, as josh romney confided to diane in august. I hate the debates. Trying to sit there and be cool and keep a smile on your face. Inside you want to fall down.
This transcript has been automatically generated and may not be 100% accurate.