Barack Obama: “We can't afford four more years of this so-called 'progress.'”

It is a basic principle of American democracy that the government can’t selectively target individuals simply because of their political beliefs or what they say.

And I will fight for that, even if I don’t always think it’s going to win.

If I had a blame pie for why politics is so polarised and why we're seeing a rise of populism in many places, it's because of that information that is going into our brains every day.

When we choose, when we make that decision, I do believe – and there is evidence for this – that the world gets incrementally better, and that is a worthy goal and it’s worth fighting for.