That is the number-one threat we face in the world. And it becomes particularly threatening if terrorists ever get their hands on any nuclear material. So a man who can be provoked by a tweet should not have his fingers anywhere near the nuclear codes, as far as I think anyone with any sense about this should be concerned.

If you look at countries that are comparable, like Switzerland or Germany, for example, they have mixed systems. They don't have just a single-payer system, but they have very clear controls over budgeting and accountability.

I think I have this old-fashioned idea that when you are asking people to vote for you, it is kind of like a big job interview, and you oughta tell people what you think you can do for them. I think we can create more economic opportunity. I think we can improve education, make college affordable, deal with the myriad of issues that we confront.

It has been the policy of the United States, Democrats and Republicans, to do everything we could to reduce the proliferation of nuclear weapons.

It is a fact that around the world the elites of every country are making money.

[Donald] Trump has a great capacity to use bluster and bigotry to inflame people.He is becoming ISIS's best recruiter.

There is absolutely no disconnect between common sense gun safety measures and protecting the Second Amendment rights of gun owners.