Because of the increase in life longevity, America can now assume that at any given time three, and perhaps four, former presidents will still be alive, even when the current president is occupying the White House.
Real estate sales was perfect training for the experience to go into public life because you learn to accept rejection, learn to meet new people, learn to work with people and find common ground. That's the way you sell houses... that's also the way you win over constituency.
It would probably take me an hour to two to write it down, get the feel of it, and that's with quite a few changes. It's not really a hard thing for me to do.