linda ellerbe, nbc news, puerto rico. >> linda ellerbe is such a god. always has been.b bush's knees literally knocking. his knees shaking, as he stood before that crowd in puerto rico. that was february 1980. but all of jeb's very nervous campaigning down there did pay off. poppy bush won the puerto rico republican primary that year with 59% of the vote, he won all 14 of puerto rico's delegates. and coming off his win in the iowa caucuses that year, poppy bush had real momentum. that presidential campaign, that 1980 campaign for his dad, that really was jeb bush's first foray into national politics. he traveled the country with his dad, and as the candidate's son, that included going on the occasional run for the cameras, just to show how strong and fit poppy bush was. >> what do you think, rabbit? >> i don't know, about 24. >> 25. >> yeah, 24 or 5. i would like to pace it at about eight minutes and see how we feel. this is going to be tough. but tell them our time. this boy might not be up for it. >> 22:45. is that our best? >> that was on firm, on good track. >> we'v