I believe, and that is that I am the strongest candidate to take it to the Republicans and win in November [2016].

I voted for every sanction against Iran when I was in the Senate, but it wasn't enough. So I spent a year-and-a-half putting together a coalition that included Russia and China to impose the toughest sanctions on Iran.

I think what the president [Barack Obama] understands, and what he's trying to do, is that we have to support the Arab and Kurdish fighters on the ground who are actually doing the fighting.

We have to do more about addiction, not only drugs, but also alcohol.

We acknowledge-now with President Obama-that we have made mistakes in the United States, and we along with other developed countries have contributed most significantly to the problem we face with climate change.

When I was growing up, my parents always told me that I had to do what I thought was right and not listen to other people. That was hard for me.

What difference, at this point, does it make?