With the ongoing domestic in-fighting in the United States and Iran over the nuclear deal — which has already become legally binding by way of a U.N. Security Council resolution — it has become clear that Congress poses the biggest risk for the deal falling through. Congress’s ability to play a spoiler role comes not only from the power it has to scuttle the deal altogether but also from its efforts at fostering an uncertain atmosphere regarding the removal of sanctions on Iran.
The effectiveness of the nuclear deal will rely largely on the P5+1 instilling confidence in the global business community that sanctions have been removed and the country is open for business. Truly removing sanctions in a way that would have tangible benefits for Iran would require shaping expectations in such a way that businesses do not feel their investments are precarious and susceptible to the political machinations of Congress or a future U.S. president.
“A rejection of the nuclear deal could lead to radicalism in Iran,” Hossein Mousavian, The Washington Post, August 28, 2015.