Leon Panetta: “I think he's been badly damaged by what took place. And I would be very surprised if his days are not limited.”

I think it's a -- it is something we've got to pay attention to because I think this is a dangerous moment. If we're facing other lone wolf terrorists in this country.

It's shaping up to be 'Trump's Vietnam.'

I think it was Walter Mondale when he was asked about the legacy of the Carter administration, said something like, we told the truth, we followed the law and we preserve the peace.

I think the United States ought to be part and parcel of any agreement to be able to provide a security assurance to make sure that Ukraine is protected from the kind of invasion that we've seen from Russia.