Proliferation

A quick guide to understanding the background, context, and potential impact of President Trump's decision not to certify the 2015 Iran nuclear deal in one concise infographic.

After decertifying the JCPOA, President Trump now has leverage to negotiate a better agreement.

In practical terms, scrapping and replacing the JCPOA is a nonstarter, so the administration should instead focus on countering Iran as its top regional priority -- and decide how it will respond when Tehran pushes back.

European leaders surely do not want the U.S. to walk away from the JCPOA. But their room to maneuver is politically limited, given Mr. Trump's unpopularity in their countries. Responding to the White House on Iran will prove difficult for them unless Mr. Trump changes his tone and emphasizes that

The recent reveal indicates strong technical cooperation with Pyongyang, raising concerns that Iran might be on the path to developing a nuclear-capable ICBM down the road.

Without a defined strategy, events will determine policy.

In responding to Tehran's dangerous regional behavior, Washington can pursue measures short of a full-scale JCPOA annulment.

Conflict with Israel might be inevitable, but the context has become more complicated than ever for both sides.

Although Rouhani is a skillful politician who convinced the Iranian leadership to go along with the nuclear deal, he likely will not be in a position to wield similar influence over his country's regional activities.