You have to make a conscious decision to change for your own well-being, and that of your family and your country.

That all depends on what "is" is.

I want a man who had the good sense to marry Michelle Obama.

When you're president, you have more power to help more people, but you also are the prisoner of circumstances as well, and countervailing political forces more.

When I first came to Washington in the 1960s, even at the height of the Vietnam War, until the end there in '68 there was a certain climate of cooperation. And then in the late sixties and in through the seventies, politics began getting more mean. And then from the eighties on it seemed to be institutionalized, this personal attack business. And I just hate it.

Two-thirds of the Iranian people would like to be reconciled with the West. They don't like the fanaticism of the governing religious council. It's the only place in the world where the last six elections have been won by the more progressive candidate, two for president, two for the mayors, two for the parliament. So most people there are sympathetic to the world we Americans want to build, whether we're Republicans or Democrats. On the other hand, almost everybody there wants them to have nuclear power. They see it as a status symbol, and a sense of their own security.

The new energy future is decentralised, entrepreneurial and needs people like you to say 'Give me a clean car, give me solar shingles to put on my roof - give me a clean future'