Barack Obama: “America is leading by transitioning away from dirty energy sources that threaten our health and our environment.”

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

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

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

A drift towards extremism was "not inevitable