Financial Tribune - Iran should initiate a plan to gradually step up its nuclear activities to raise the stakes for Europe so that it would agree to pay the price of defying Washington on the 2015 nuclear deal, a senior foreign policy expert said.

“Europe should be brought to a crossroads,” Nasser Hadian also told the Etemad newspaper in a recent interview, in which he discussed his proposal to compel the European signatories to act more seriously to save the agreement.

France, Germany and Britain—European signatories to the deal with Iran that curbed its nuclear program in exchange for sanctions relief—have scrambled...