Opponents of the Iran deal have been unable to produce a viable alternative. That is because there really are no alternatives left. Should the Iran deal collapse under the weight of spoilers like Schumer, Iran will get a nuclear weapon. And once Iran achieves and announces that capability to the world, no expert will be able to foresee the consequences.
Qassem Soleimani, Iranian military leader, ideologue, and commander in chief of the Quds force- a branch of the Islamic Republic's Revolutionary Guard Corps that conducts extraterritorial military and clandestine operations- has been coming out of his shell and becoming more vocal in stating his opinions.
If Iran is indeed on the verge of a historic deal with Washington over Iran's nuclear program, which would release the country from the economic straitjacket imposed by sanctions, where do its long-term interests lie? In reentering the global economy as an oil exporter, or in fighting bitter wars in an Arab heartland?