Barack Obama: “We cannot stand idly by when a tyrant tells his people that there will be no mercy.”

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

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’m going to insist that we can do better than we’re doing right now.

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