Joe Biden, Elizabeth Warren to debate side-by-side for 1st time

The former vice president and front-runner will be in the middle of the stage during the Houston Democratic debate.
1:23 | 09/12/19

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Transcript for Joe Biden, Elizabeth Warren to debate side-by-side for 1st time
Of course, the stage is set right here behind me and some big differences this year. This is the first debate held on just one night, with all the leading democratic candidates on one stage. You can see the stage right here over my shoulder. Former vice president Joe Biden will be in the middle. He, of course, is the front-runner. Several new polls including ours have him at the top. For the first time, right beside him, centerstage, Elizabeth Warren. She's been gaining in the polls, including our own. Let's take a wide shot tonight of the stage here where Mary Bruce is up there on that stage, where the candidates will be this time tomorrow night and Mary, the stakes could not be higher for really all the candidates as they try to break out. Reporter: Yes, and David, for the first time, voters will be able to compare these two candidates side-by-side, standing right here will be Joe Biden and right here next to him, Elizabeth Warren. These two candidates have wildly different campaign styles and visions for the future. We'll be watching closely to see if they attack each other with Warren on the rise, will Biden take some shots at her? And will the other candidates, too, like Bernie Sanders? He and Elizabeth Warren share many of the same positions, but so far, they've declined to go after each other. Now, standing next to them will be kamala Harris and Pete buttigieg. They are looking for a boost. The candidates on the wings are in need for a jolt, too. They are looking for that breakout moment. David? We'll be watching. And I'll be moderating with our George Stephanopoulos and linsey Davis and our colleague Jorge Ramos from univision. That's tomorrow night, 8:00 P.M. Eastern, one stage, one night. To more news, and a

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

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