Thank you very much for your question.
I believe that a nuclear deal is possible, even with this regime. I'm skeptical that a deal could be reached by July 30 unless it's a bad deal. If there's a bad deal it could be reached very quickly.
The fundamental condition—there are many conditions of a good deal—the sine qua non of a good deal is the ability of the international community to verify and inspect Iran's nuclear facilities, to have unfettered access by the IAEA anywhere, any time. Iran's record of nuclear development is one of nuclear mendacity. This is a regime that lies profoundly; it lies persistently; it lies pervasively; it lies perniciously.
The only guarantee that we have against a future nuclear weapon is the ability of the international community to go anywhere any time. That requires Iran to fully come clean on the past military dimensions of its program, to provide all documentation to the IAEA, to answer all their questions, and then to permit the IAEA, with that information, to design a verification and inspection regime that is unfettered, that goes anywhere, any time. Without that, I fear that a nuclear deal would be fundamentally flawed, and we'll be merely punting on the question of Iran's nuclear weapon, not solving it.