Robert Joseph: “The nuclear option is there for Iran if it decides to go down that path.”

This is a bad deal.

Once you allow Iran to maintain and in fact under this agreement expand a large-scale infrastructure for enrichment, the agreement in and of itself explicitly recognizes at that point Iran as a nuclear weapons threshold state.

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

It is certainly better that Iran, at declared facilities, is spinning fewer centrifuges rather than more centrifuges.