Dick Lugar: “I express my appreciation to all of you for what you did to unravel it. But it should never have happened.”

The reasons for Russia's violation are unclear. But I believe the violation was likely due to a number of factors...

There is precedent for using patient diplomacy to resolve treaty violations.

It seems to me to be really a safety net there.

What we really need right now is a revival of NATO, a revival of the spirit of the allies...