here is abc's sharyn alfonsi. >> reporter: as they walked on the stage last night, everyone noticed, especially dad. >> sasha and malia -- before our very eyes you are growing up to become two strong, smart, beautiful young women. >> malia and sasha once hoisted in their parents' arms. you can't help but marvel as they inch up before our eyes. malia now shoulder to shoulder with her mother. she is now 14. sasha 11. the next four years for them marked by first dances, college applications and dating. >> teenage hood is complicated. i should also point out that i have men with guns that surround them often. it means they never get in the car with a boy who had a beer. >> reporter: malia anxious to get her driver's license. >> >> we will have to figure out the logistics. i promised her she will learn how to drive. >> reporter: they will spend most of their lives living in the white house yet we rarely get glimpses of them or hear their voices. their parents trying to preserve benchmarks of home, family dinners, after-school games, life lessons, a family dog. >> i am so proud of you guys

abc's sharyn alfonsi reports on their workload. >> reporter: for michelle obama and ann romney, it is the end of a long grueling road. >> it is an emotional day for me, because i were i could tell you what i learned. >> reporter: they have been there every step of the way from the photo-ops. >> may i introduce to you. >> to the stump speeches. >> this is our time. >> reporter: to the conventions. >> michelle, i love you so much. what a lucky man i am. >> ann would have succeeded at anything she wanted to do. >> reporter: both women displaying equal parts charm. >> i love you so much. >> reporter: and steely endurance. >> we have been in so many of your communities. >> reporter: michelle obama's been a key fund raiser campaigning at 191 events. >> it sound like you are fired up and ready to go. >> reporter: ann romney a regular on the trail too. just this weekend appearing in five swing states, exhausted, and emotional time. >> that is amazing to walk in and have this kind of emotion come to us. it makes me believe we can win colorado. >> reporter: throughout the campaign both women ha