I very much believe in reforming the tax system.

Members of Congress on both sides of the aisle, are motivated by all kinds of issues. They're sincerely interested in the economy, in terrorism, in social issues. But the one overriding thing they're interested in is getting reelected. And if they think that it's harder for them to get reelected by cooperating with each other, then they won't cooperate.

Now that Iran's actions have been verified, it can begin to receive relief from certain nuclear sanctions and gain access to its own money that had been frozen.

David [Cameron] has been an outstanding friend and partner on the global stage and, based on our conversation, I'm confident that the UK is committed to an orderly transition out of the EU.

Reading is important. If you know how to read then the whole world opens up to you

Imagine if you had genuine, high-quality early-childhood education for every child, and suddenly every black child in America - but also every poor white child or Latino [child], but just stick with every black child in America - is getting a really good education. And they're graduating from high school at the same rates that whites are, and they are going to college at the same rates that whites are, and they are able to afford college at the same rates because the government has universal programs. So now they're all graduating.

The alternative, no limits on Iran's nuclear program, no inspections, an Iran that's closer to a nuclear weapon, the risk of regional nuclear arms race, and the greater risk of war - all that would endanger our [American] security.