Prospects for negotiations between the United States and Iran on nuclear proliferation have dimmed significantly. Just a few days ago, it seemed the two sides were ready to return to negotiations. But US President Donald Trump then said he was not speaking to Iran and was not offering Tehran anything.

The Cybersecurity and Infrastructure Security Agency warned that a “hostile foreign adversary” is threatening to release material reportedly stolen from Trump and several of his allies.

That security architecture dissuading countries from growing and pursuing their own nuclear weapons is collapsing.