Robert Joseph: “This is a bad deal.”

I think it is imperative to demonstrate U.S. leadership in order to keep those sanctions on Iran...

I think there are a number of fatal flaws in our position and in fact in what has already been agreed.

All arms control commitments must be scrupulously observed, and if they are not, there must be consequences.

My skepticism is that we continue to apply cold-war approaches in our relationship with Russia.