Transcript for Meet Mitt Romney's 5 Sons
And finally today, the romneyboys, tagg, matt, josh, ben and craig came into the convention hall to talk to me. First, they expressed concern for everyone in the storm watch tonight. But then, we turned to the subject of their dad, their mom and what is, after all, the highs and lows of running for president about to be a dreamed achieved. None of us expected to be here, I think this is a big -- it will be a big moment for us to watch our dad go up there and accept the nomination. Despite all the stuff, the hoopla, he's still dad to us. A lot of the nerves worked their way out early in the campaign. Now, we're just anxious and excited. Reporter: This moment, more than six years after their father first began their quest for the presidency. I want to introduce my family, my oldest, tagg, father of four. Reporter: Five sons in all, four in business like their dad. One, ben, a doctor. All are married and 15 grandchildren. We have a photo here of the family gatherif the romneys. Absolutely incredible. You can tell when you guys get together, there's a global khaki shortage. I'm a rebel. No one wears khakis anymore. You can see that. Reporter: They say they're a family like any area. Anybody ever run away from home? Many times. Many, too many times. Seven, eight minute. Reporter: Really? I would run away. Hiding in a bush. Hiding in a bush, watching tv, hoping that everyone was, you know, missing me. There has been a rumor going around that paul ryan actually is the sixth son. Yeah. Do you feel this? He's got my dad's hair. He's got the good hair. Yeah, a little nervous. But my dad ended up picking the person he thought would be the best. Somebody who he thought would pick up the mantra of the republican party eight years from now. Reporter: And the brutal reality of campaigning has left the children protective. What would you say are the toughest moments? The hardest moments are the debates. I hate the debates because you just -- yeah. You experience huge amounts of stress. If I'm watching him on tv, I'll just be laying on the floor. It's pretty tough. But -- and if you're in person, you're just sitting there trying to be cool and keep a smile on your face and just want to fall down. Reporter: But they say no battering by the campaign can equal the moment their mother was diagnosed with m.S. That was only the realtime he really struggled. That was important. You know, winning and losing, those things, you know, you have a couple days of struggle, but you get through that. It's not the end of the world. But when your loved one is in harm's way or sick, that's really what had him upset. Reporter: They also watched the stresses on their mom. I'd put carlton on that road, the campaign manage, saying he needed to pull her off a day or two. She'll fight and say, no, no, I'm doing fine. She knows how to rein it back in. Reporter: All in all, 150 members of the romney family are heading to tampa to watch the man who's going to reintroduce himself, personal, emotional and the nominee. He gets emotional -- if you ask him about his dad, he'll get emotional. If you ask him about my mom, he'll get emotional. He gets emotional when he talks about god and christ. I mean, the campaign really brings a family together.
This transcript has been automatically generated and may not be 100% accurate.