Chuck Hagel: “Once you are in, you cannot unwind it.”

That administration really laid out in 1991 and 1992 the threats of climate change, especially for national security.

It is a measurement. But I don't think it is the measurement. I mean, I was in a war with a lot of body counts every day. We lost everyone.

No one person should ever govern a party. That’s not the point of political parties. Political parties must be diverse, have different opinions.

They're not trained for law enforcement.