Some people think elections are a game: who's up or who's down. It's about our country. It's about our kids' future. It's about all of us together. Some of us put ourselves out there and do this against some difficult odds. We do it, each one of us, against difficult odds. We do it because we care about our country. Some of us are right, and some of us are not. Some of us are ready, and some of us are not. Some of us know what we will do on day one, and some of us haven't thought that through.

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 a revolution transitioning from fossil fuels to clean, renewable energy - somebody's going to be the 21st-century clean-energy superpower.

One lesson I have learned the hard way, and there will not be any such thing in the White House. Although, I am quick to add, there's no evidence that it was ever hacked. And unfortunately, you can't say that for a lot of the government.

I am not going to engage in the kind of behavior that you see from Donald Trump.

I will go anywhere, anytime, to meet with anyone to find common ground.

I'm just grateful my dad never got a contract with Donald Trump, because I don't know what we would have done.