I will seek out the best advice, and I will create a strategy and I will persuade the American people what the role of America should be. I've laid out a policy of rebuilding our military.

This is something - we have to have the best defensive capabilities. We need to coordinate all of our efforts with the private sector. We need to give them liability relief so that we can do that.

Donald [Trump], you're not going to be able to insult your way to the presidency. That's not going to happen.

If we are going to compete in this world we're in today, there is no possible way we can do it with lowering expectations and dumbing down everything. Children are going to suffer and families' hearts are going to be broken that their kids won't be able to get a job in the 21st Century.

The idea that somehow we're better off today than the day that Barack Obama was inaugurated president of the United States is totally an alternative universe. The simple fact is that the world has been torn asunder.

America does not have the luxury of withdrawing from the world, our security, and our prosperity, and our values demand that we remain engaged and involved in -- often distant places.

That, by the way, is perhaps the most ludicrous comment I've ever heard, that climate change is a bigger threat to our country than radical Islamic terrorism.