and welcome to today on this tuesday morning. i m ann curry. i m matt lauer. already down in florida this morning voters are casting their ballots in the biggest contest to date in this primary season. with a double digit lead in the polls mitt romney is acting and sounding confident. he even broke out in song on monday. and win or lose, newt gingrich is vowing to keep on fighting. we ll talk about where this race is headed with gingrich supporter, herman cain. and one woman s unimaginable ordeal that started in middle school. for 19 years, tracy lundin has been stalked and harassed by the same man. he s now been sentenced to prison. coming up, tracy will share her story in a live interview. we have shown people over the years, lots of emotional reunions between soldiers and children. we found one that was particularly touching. we ll show you coming up in a little bit. very dear. we begin now with today s key presidential primary in florida. nbc s peter alexander