Tehran would be the winner of this U.S. rejection because it would achieve its major objective: the lifting of most sanctions without being required to accept constraints on its nuclear program. Iran could also claim to be a victim of American perfidy and try to convince other nations to break with U.S. leadership and with the entire international sanctions regime.
Meanwhile, Israel would be the loser, as Iran would resume its nuclear program without inspections and would garner support from other nations around the world. Ninety countries, including Saudi Arabia and other Gulf states, have already supported the deal. Though Israel opposes it, many key Israelis do not, including retired senior generals and a former Mossad leader.
The history of Iran’s efforts to build a nuclear program without constraints is instructive. From 2005 to 2013, Iran rocketed from about 200 installed centrifuges to 20,000, while Washington sought to stop them through sanctions. Unrestrained by the joint nuclear agreement, Iran could quickly resume its aggressive nuclear program: move from 20,000 to 200,000 installed centrifuges, resume enriching uranium to 20 percent in its deeply buried facility, finish its plutonium reactor and develop reprocessing.
Vindicated in his distrust of the United States, Iranian Supreme Leader Ayatollah Ali Khamenei would no longer have any incentive to negotiate. The much flaunted and powerful Iranian “hard-liners” would likely return to dominate national politics and push President Hassan Rouhani’s more centrist team aside permanently. A return to the “hard-trodden path of diplomacy,” as Schumer proposes, would have to be conducted without Iran and its six negotiating parties.