I don't think I underestimated [Vladimir Putin], but I think that I underestimated the degree to which, in this new information age, it is possible for misinformation for cyber hacking and so forth to have an impact on our open societies, our open systems, to insinuate themselves into our democratic practices in ways that I think are accelerating.

There is enough oil out there for world demand. It is true that a lot of what's driving oil prices up right now is not the lack of supply. There's enough supply.

The conversations have been cordial. [Donald Trump] has been open to suggestions, and the main thing that I've tried to transmit is that there's a different between governing and campaigning, so that what he has to appreciate is as soon as you walk into this office after you've been sworn in, you're now in charge of the largest organization on Earth.

We have a stake in one another...what binds us together is greater than what drives us apart.

We remember the grind of the insurgency -- the roadside bombs, the sniper fire, the suicide attacks. From the 'triangle of death' to the fight for Ramadi; from Mosul in the north to Basra in the south -- your will proved stronger than the terror of those who tried to break it.

A nuclear Iran is a threat to America's national security, and it is a threat to Israel's national security. We cannot afford to have a nuclear arms race in the most volatile region of the world.

The path of America's development is never a straight line. Sometimes we move in ways that are forwards; sometime that seem back.