Update: this action, now closed, ran in October 2017.
As we expected, President Trump decertified the Iran nuclear deal on October 17th but declined to kill it outright by imposing new sanctions. Instead, he dropped the fate of the deal in the lap of Congress, hoping to make lawmakers complicit in US violation of the terms of the JCPOA.
This would give Iran the green light to resume its nuclear program and increase the risk of escalation to an armed conflict with Iran. But that’s not all. It would mean that as the US and Israel seek to combat Iran’s nefarious activities in the Middle East we could be up against a nuclear-armed state. Further, the US would rupture relations with our allies and undermine our credibility, such that North Korea would have no reason to negotiate its nuclear disarmament.