The United States will demand on Thursday that all United Nations sanctions be reimposed against Iran, President Donald Trump announced, a move that follows the US’s embarrassing failure to extend an arms embargo against Tehran. Al Jazeera reports though that the administration’s insistence on snapping back international sanctions against Iran sets the stage for a contentious dispute. It is possible that the US call will be ignored by other UN members – an outcome that could call into question the UN Security Council’s ability to enforce its own legally binding decisions.