The fundamental question posed by President Obama’s Iran diplomacy has always been whether it can prevent a nuclear-armed Middle East—in Iran as well as Turkey and the Sunni Arab states. Mr. Obama unveiled a “framework” accord on Thursday that he said did precisely that, but the claims warrant great skepticism, not least because they come with so many asterisks.
The framework is only an “understanding” among Iran and the six powers because many of the specifics are still being negotiated. But Mr. Obama wanted to announce some agreement near his self-imposed March 31 deadline, lest Congress ratchet up sanctions on Iran, and now Secretary of State John Kerry will go back to negotiate the crucial fine print.