Reagan, people claimed, was too old to run for president and to be elected. But he proved himself such a vigorous campaigner in the primary system that he overcame those beliefs.

The reverse is a system in which you basically let people who were leaders in one way or another - people sometimes decried as party bosses, people who are part of special interests make the decision. And I think that's a worse system than the one we have.

But he [Franklin Roosevelt] specifically prohibits any black participation from the Deep South, something which just infuriates people who'd been his supporters and who'd believed in him and resides that he is just shockingly abandoned the right of the people to rule. It's a pretty horrible story in that respect.

Reagan, people claimed, was too old to run for president and to be elected. But he proved himself such a vigorous campaigner in the primary system that he overcame those beliefs.

You know, the primary process itself is very confusing. But in the end, I guess I believe what Winston Churchill said, which is that democracy is the worst form of government except for all the others. And that phrase of his, which I always have previously thought to be kind of acute, more recently I've thought of it in this way, to say well, you know what, he's also saying it's the worst form of government - except for all of the others.

I think Roosevelt proves himself to be the ultimate political force in this book. He really wasn't for primaries until he realized it was the only way in which he could challenge a sitting president then it becomes his crusade, is to create the primaries and to call for the people to rule.

And of course, in the case of Barack Obama, had he not won primaries - and particularly the heavily important caucus in Iowa - if the public hadn't shown that they were prepared to vote for a black president, we wouldn't have one today.