What we can be scientifically certain of is that our continued use of fossil fuels is pushing us to a point of no return

Of course, there's been a real debate about where to invest and where to cut, and I'm committed to working with members of both parties to cut our deficits and debt. But we can't simply cut our way to prosperity.

I don’t believe it is possible to transcend race in this country. Race is a factor in this society. The legacy of Jim Crow and slavery has not gone away. It is not an accident that African-Americans experience high crime rates, are poor, and have less wealth. It is a direct result of our racial history.

There are legitimate concerns and anxieties that the forces of globalisation are leaving too many people behind - and we have to take those concerns seriously and address them. But the answer isn't to turn inward and embrace protectionism. We can't just walk away from trade.

I am who I am. You sort of get what you see with me.

You know, one of the things I think you understand as president is you're held responsible for everything, but you don't always have control of everything, right?

Jobs was brave enough to think differently, bold enough to believe he could change the world, and talented enough to do it.