Israeli Prime Minister Benjamin Netanyahu’s revelation of documents proving Iran worked on a nuclear warhead have fundamentally changed the debate ahead of President Trump’s May 12 deadline to determine whether or not to walk away from the Iran nuclear deal, formally known as the Joint Comprehensive Plan of Action.

Advocates of the Iran nuclear deal say that Netanyahu’s exposure of 100,000 documents is proof that the Iran deal worked because, they insist, the agreement ended such Iranian work. That is far from clear.