Chuck Hagel: “America does not leave its soldiers behind. We made the right decision. And we did it for the right reasons. To bring…”

When the National Guard opened up on students and killed students, partly because they weren't trained, they panicked.

This is so unpredictable. And we've never seen anything quite like this in our lifetime, so there is no playbook here.

The Chinese are watching this as relates to Taiwan, the Iranians, the North Koreans -- all countries are watching this, and watching the U.S. response to it, and the West response to it.

I think the GOP is in a lot of trouble. And I do think an encouraging sign, I think the strong control that Mr. Trump has exercised over the Republican Party is dwindling.