Barack Obama: “John McCain still cannot describe, can't tell the American people a single major thing he would do differently from…”

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

A drift towards extremism was "not inevitable

People need to “rediscover what’s the story we tell about how we’re going to live together, and see each other, and recognise each other, and disagree, and yet, still care for each other”.

I think when we act on that basis, it doesn't always work out, but over time things do get better.