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.

I have a different experience. My father was a small-businessman. He worked really hard. He printed drapery fabrics on long tables, where he pulled out those fabrics and he went down with a silkscreen and dumped the paint in and took the squeegee and kept going.

Often those who are denied rights are least empowered to bring about the changes they seek.

If I had lost the popular vote but won the electoral college and in my first day as president the intelligence community came to me and said, "The Russians influenced the election," I would've never stood for it. Even though it might've advantaged me, I would've said, "We've got to get to the bottom of this." I would've set up an independent commission with subpoena power and everything else.

We know that Donald Trump has shown a very troubling willingness to back up [Vladimir] Putin, to support Putin, whether it's saying that NATO wouldn't come to the rescue of allies if they were invaded, talking about removing sanctions from Russian officials after they were imposed by the United States and Europe together, because of Russia's aggressiveness in Crimea and Ukraine, his praise for Putin which is I think quite remarkable.

I want to send a clear message to every board room, every executive suite across America, if you scam your customers, exploit your many employees, pollute our environment, or rip off taxpayers, we will find ways to hold you accountable.

We didn't put a single boot on the ground, and [Muammar] Gaddafi was deposed. The Libyans turned out for one of the most successful, fairest elections that any Arab country has had. They elected moderate leaders.