Chuck Hagel: “Energy security is central to national security.”

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

This is really authoritarian.

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

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.