GOP Roll Call: Mitt Romney Wins Nomination

Republican National Convention underway after Hurricane Isaac delays start.
3:00 | 08/28/12

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Transcript for GOP Roll Call: Mitt Romney Wins Nomination
We thank all of you as we turn next right here to tampa, florida. They're, of course, watching the weather, too, at the republican national convention. You can see everybody out in force. Right behind me there. And shortly before we came on the air, mitt romney became the official nominee, 1,144 votes putting him over the top. New jersey, 50. Romney. And coming up tonight, two crucial moments. The keynote speak, chris christie of new jersey and the woman who will be instrumental in reintroducing her husband, ann romney. Abc's david muir is on the convention floor right now. Thank you, diane, on the floor, not far from your broadcast booth here at the republican national convention. To give you an idea of where we're standing, we're with the florida delegation over my shoulder. Just not far off, the ohio delegation. Two swing states the governor would like to carry. He would also like to improve his numbers with women tonight and tonight here, enter mrs. Romney. Mitt romney and his wife, ann, arriving in tampa today, just hours before ann romney will appear before her biggest audience ever. On the plane to tampa, mrs. Romney in the front of the cabin, her glasses on, tweaking her speech. She brought her homemade welsh cakes to the back of the plane and delivered something else. A hint at what's coming tonight. You will see that my speech isrtfelt. Reporter: Her speech comes at a much needed time for the romney campaign. The most recent abc news/"washington post" poll show 35% have a favorable view of him, 54% unfavorable vote. Mrs. Romney late today taking to the stage for a practice run of sorts, the campaign hoping for prime time appeal will help. She's got more energy than any person I've ever seen. Rule, truly. Reporter: While mrs. Romney will offer a more special side to her husband, expect a rousing one from governor chris christie tonight, the fiery brand expected to ignite them. Your rear end is going to get thrown in jail, you idiot. If what you want to do is put on a show, then I have no intention of answering your questions. Reporter: Today, governor cristy made it clear, he knows the stakes. I'm feeling pretty good. I'm in a good mood. You have seen otherwise from me. Of course, ann romney up first tonight, diane, as you know, she's been practicing inside an auditorium two days in a row. I'm told there's a handful of people in that room, her whund of them and it's been described to me he had a grin ear to rear.

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

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