It used to be that the working class, broadly speaking - Americans who worked with their hands, who worked in factories, who were not in management - were an interest group, a political interest group. And their main spokespersons were the Democrats. Their platform was the Democratic Party. And that began to change after the 1960s. Not for black or other working class Americans, but for white working class.

I do think Donald Trump would be a catastrophic turn in American history.

What goes on in a person's head, what impels them to a political choice, it's a pretty complicated question.

I think in the '50s, the percentage of Americans employed by the private sector who were in unions was above 30 percent. And now it's in the single digits, so it plummeted. And with the plummeting of unions came the weakening of an organized working-class voice in politics.

We've just been sort of spinning our wheels for such a long time, for decades really, with each new president being considered illegitimate by the other side. That's been the case ever since Bill Clinton. And it's a - you can't keep frittering away your political capital that way and expect there not to be some long-term rot that sets in.

Politics should seize the imagination.

Hillary Clinton's such a classic Democratic political figure and believes so much in institutions and in gradualism in the old way of reaching compromises with the opposition in the back rooms. That's what she did in Congress. It's what I imagine she'll try to do in the White House.