Ahead of Trump’s announcement on the #IranDeal - at which point he is expected to reimpose sanctions in violation of the agreement - it is worth recapping what nuclear agreement has accomplished & its nonproliferation value 1/
As a result of the 2013 interim deal, Iran’s stockpile of uranium enriched to 20 percent was neutralized. The JCPOA prohibited enrichment to levels above 3.67 percent for 15 years 2/ 
Iran also removed nearly 20,000 centrifuges, including its more advanced IR-2 machines, and is capped at enriching uranium only with 5,060 IR-1s at Natanz. Iran can only stockpile the equivalent of 300 kilograms of uranium enriched to 3.67 percent 3/
Iran shipped out its stockpile of low enriched uranium as part of the #IranDeal. As a result of the enrichment and stockpile limitations, it would now take Iran more than a year to obtain the nuclear material for bomb - significantly longer than the 2-3 months in 2013 4/
The #IranDeal also put in place a more intrusive monitoring & verification regime, including Iran’s commitment to adhere to its additional protocol with the IAEA in perpetuity. This is a critical measure that does not “sunset.”
There is no reason for Trump to withhold sanctions relief & violate the #IranDeal. Iran is complying with the agreement - Trump’s own cabinet members, including deal critics like Pompeo, have confirmed that. 6/
It is critical that Congress and Washington’s P5+1 partners in the deal - China, Russia, France, Germany, and the United Kingdom - denounce Trump’s action for what it is, an irresponsible & dangerous move that threatens the future of an agreement that is working 7/
Equally important, these states must take steps to continue implementing the deal & urge Iran to stay committed to the agreement, despite any US violation. 8/
Maintaining the #IranDeal keeps the door open for future negotiations to build on the nonproliferation value of the accord. A US violation, and possible withdrawal, only decreases the chances of future negotiations by isolating the US & undermining Washington’s credibility 9/
Maintaining the deal also gives the EU and the E3 a platform to pursue talks with Iran on other issues of concern, like Iran’s troubling ballistic missile activities and transfers of missiles in violation of UN Security Council Resolution 2231 10/
The #IranDeal was never meant to be a panacea, but losing it will only further destabilize the region & manufacture a nuclear crisis that the world cannot accord 11/
Also, the UN Security Council resolution endorsing the deal calls upon all states to support the agreement and refrain from undermining it. Supporting the #IranDeal is not just a task for the EU, E3, Russia & China if the US violates it - it is a global responsibility. 12/12
Noticed a typo in tweet 3 in this thread that I would like to correct- Iran removed around 13,000 centrifuges, including its IR-2s (not 20,000). Iran went from around 20,000 centrifuges installed to 5,060 enriching uranium under the nuclear deal’s limits.
