If you think that we've overregulated in the environmental space what I can show you is that we have tripled the amount of wind power in this country, increased by tenfold the amount of solar power. We are producing as much oil and gas as we've ever produced.

Our enemies are also seeking the abilities to sabotage our power grid, our financial institutions, our air traffic control systems.

There's a reason why the NRA's not here. They're just down the street. And since this is the main reason they exist, you'd think that they'd be prepared to have a debate with a president.

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.

There are certain occupations - probably, most prominently, politics - where there would be a bias against somebody who's agnostic or atheist in running for office.

At the moment that we persuade a child, any child, to cross that threshold, that magic threshold into a library, we change their lives forever, for the better

One of the things I've learned about being president is that we'll work on issues for long periods of time, sometimes in obscurity.