Barack Obama: “We can't have a Commander in Chief who suggests that it's okay to torture people or to ban entire religions from our…”

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.

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

This race is going to be close. It could determine which party controls the Senate and whether Ohioans can count on the people in Washington to be fighting for you.

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