The old rules may say we can’t protect our environment and promote economic growth at the same time, but in America, we’ve always used new technologies - we’ve used science; we’ve used research and development and discovery to make the old rules obsolete.

There was never a promise that race relations in America would be entirely resolved during my presidency or anybody's presidency. I mean, this has been a running thread - and - and fault line in American life and American politics since its founding.

The biggest challenge, I think, is always maintaining your moral compass.

There is not a liberal America and a conservative America - there is the United States of America. There is not a black America and a white America and latino America and asian America - there's the United States of America.

We cannot simply look to austerity as a strategy and it is incredibly important that the Greek people see improvements in their daily lives so that they can carry with them the hope that their lives will get better.

There's no straight line to progress.

Everybody acknowledges that the current path we're on is unsustainable, not just for the people who don't have health insurance but for those who do.