Presidents should be very careful at all times in discussing the use or non-use of nuclear weapons. Presidents since the cold war have used nuclear deterrence to keep the peace, and I don't believe that any president should make any blanket statements with respect to the use or non-use of nuclear weapons.

If we repeal [ Barack Obama's health care law] as Donald [Trump] has proposed, all of those benefits I have mentioned are lost to everybody...and then we will have to start all over again.

I think we can take back Mosul, and then we can move on into Syria and take back Raqqa.

The Republicans can't go after Donald Trump where I think he needs to be criticized.

I believe that America has the opportunity to once again live by our values, live up to our values in the 21st century, but I think that America can only do that if Americans can succeed. And there are lots of reasons why Americans today are feeling left out and left behind.

[Donald Trump] said, back in 2006, "Gee, I hope it does collapse, because then I can go in and buy some and make some money." Well, it did collapse.

We have never in the history of our country been in a situation where an adversary, a foreign power, is working so hard to influence the outcome of the election, and, believe me, they're not doing it to get me elected. They're doing it to try to influence the election for Donald Trump. Now, maybe because he has praised Putin, maybe because he says he agrees with a lot of what Putin wants to do, maybe because he wants to do business in Moscow, I don't know the reasons.