Leon Panetta: “You cannot continue to have several different versions of what took place here. There's one version. There's one truth…”

Well, I think you saw a tragic and historic moment take place in the Oval Office, in which 80 years of United States foreign policy has largely been turned on its head.

If he is careless with that awesome power, the United States could very well find itself in another world war.

I think it's pretty clear that that Mr. Trump has turned 80 years of U.S. foreign policy on its head.

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.