Barack Obama: “I know that giving up his seat in Congress after nine terms will require a sacrifice both for John and his constituents.”

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.

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

The full weight of the federal government is being brought down on a law-abiding elected official because she has dared to criticize the president.

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