Barack Obama: “Today, we have transformed what it means to live with HIV/AIDS.”

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.

A drift towards extremism was "not inevitable

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.

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.