The United States declared a snapback of UN sanctions on Iran that had been lifted under the 2015 nuclear deal, and U.S. Secretary of State Mike Pompeo
threatened consequences (Al Jazeera) for UN members who do not cooperate. The administration is also expected to
impose new sanctions (WSJ) and outline enforcement mechanisms and penalties for violators today.
Parties to the 2015 deal rebuked the U.S. announcement. France, Germany, and the United Kingdom argued that the United States, which withdrew from the agreement in 2018,
lacks authority (Guardian) to reimpose sanctions on Iran or sanction countries that disregard them. Meanwhile, Iran pledged a “decisive response” against the United States and promised to uphold the nuclear agreement if the remaining parties do the same.