Obama’s presidency is coming to an end, the Republicans are poised to regain control of the Senate in November’s mid-term election, and Democrats are increasingly reticent to be viewed as “soft on Iran.” As a result, the US Congress appears to be growing more hostile toward a deal; indeed, the longer it takes to conclude a final agreement, the more likely Congress is to scupper it.
但伊朗也认识到时间紧迫。奥巴马的总统任期正在走向尾声，共和党大有在11月的中期选举中控制参议院之势，而民主党则日益被认为“对伊朗太软弱”。因此，美国国会应该会对与伊朗的协议敌意越来越大；事实上，最终协议达成越晚，国会阻挠的可能性就越大。