Nuclear deal's opponents seek tougher stance on Iran

Israel, Saudi Arabia and Iran's other rivals have long wanted to scuttle the nuclear deal, which they see as undermining the strategy they say the world should be taking: a tough, confrontational stance against Tehran's ambitions in the region.

But the deal's unravelling could backfire and spark even more unrest in the Middle East. Also, if Iran follows with an all-out revival of its nuclear program, Saudi Arabia has threatened to launch a nuclear weapons program of its own in response.

Traditional foes Saudi Arabia and Israel — both U.S. allies — have found common ground as critics of the 2015 deal, which was brokered by Iran and the five permanent members of the U.N. Security Council, Germany and the European Union.