Iran’s top nuclear official said Monday that his country might rethink its cooperation with the International Atomic Energy Agency if President Trump scrapped American participation in the 2015 agreement limiting Iranian nuclear activities.

The warning, from Ali Akbar Salehi, president of the Atomic Energy Organization of Iran, went beyond generic threats of unspecified Iranian reprisals if Mr. Trump reneges on the accord, reached with Iran and six world powers, including the United States. Continue reading.