Social Security is a promise that we cannot and must not break.

If we do not get our act together and transform our energy system away from fossil fuel, there is a real question as to the quality of the planet that we are going to be leaving our children and our grandchildren.

I think the way for [Marco] Rubio to say to [Donald] Trump supporters, hey, essentially he's conned you. He's a con man. That's what they do. You pour gold people.My goodness, that's not the way to bring them in.

What the Des Moines Register said - you know, there were coin - I think there were half a dozen coin flips - a fairly chaotic type situation. At the end of the day, no matter how it's recounted, it will break roughly even. I love and respect the caucus process in Iowa. See, and I don't have to say it, because they voted already.

Freedom of speech, the right to dissent, the right to protest, that is what America is about. And politically every leader in this country and every American has got to stand up against any form of violence. That is unacceptable.

I am proud of the campaign that we ran. Obviously, I wish we could have done a little bit better.

I know that virtually every member of the Senate understands we just cannot turn our back on men and women who have put their lives on the line to defend us and who are hurting today.