Barack Obama: “We've made the decision not to participate in the public financing system for the general election.”

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 decision about how do we face and embrace this finite amount of time we have on the planet.

A drift towards extremism was "not inevitable

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.