him back then. if jackie kennedy 30 years probably probably changed her opinion because the tapes were made very soon after the assassination. let's turn our attention to lbj. what was the source of the dislike between jfk and lbj? what was that tension. >> these were men from two different worlds. you have kennedy, the northern massachusetts democrat, and lin done -- lyndon johnson, the son of a poor farmer from texas democrat. the most powerful man in the cincinnati, without any question. he -- in the senate, without any question. he wanted to be president and kennedy gets the nomination partly because he offers johnson the nomination. >> they didn't like each other, why? >> they didn't like each other because they were both powerful, ambitious. >> so it was a rivalry? >> it was a rivalry in the sense that all politicians are rivals. i mean we see that today.