For decades, our differences with Iran meant that our governments almost never spoke to each other. Ultimately, that did not advance America's interests.

Climate change is one of the issues I worry most about because its impacts are enormous. But they're gradual, they're not immediate.

I've said to [Donald Trump], and I think others have said to him that the day that he is the President of the United States, there are world capitals and financial markets and people all around the world who take really seriously what he says, and in a way that's just not true before you're actually sworn in as president.

Who is Barack Obama? Contrary to the rumors you have heard, I was not born in a manger. I was actually born on Krypton and sent here by my father Jor-El to save the Planet Earth. Many of you know that I got my name, Barack, from my father. What you may not know is Barack is actually Swahili for 'That One.' And I got my middle name from somebody who obviously didn't think I'd ever run for president. If I had to name my greatest strength, I guess it would be my humility. Greatest weakness, it's possible that I'm a little too awesome.

My staff was very excited for Brisvegas. When I arrived, they advised I needed some XXXX.

The president [Barack Obama] laid out his vision for foreign policy in a way that we hadn't heard before. And it could be summed up, I think, in two words - realistic idealism.

America's nurses are the beating heart of our medical system.