Juan Cole reports that Iran's supreme leader, Ayatollah Khameini has responded to Trump's withdrawal from the JCPOA and Pompeo's Plan B 12 demands with 6 demands for Europe: 1) condemn the US withdrawal, 2) stop pressing Iran on missile development, 3) criticize any further US boycotts, 4) undo damage to Iran economy of boycotts especially to buy any oil not able to be exported because of them, 5) support financing of Iran economy, and 6) respond rapidly to these demands. According to Cole they are not optimistic the European nations will be able to withstand the US sanctions, with the impending withdrawal of France's Total a harbinger. Macron may be key.
If demands not met, Iran will return to enriching uranium to 19.75%, enough for medical use and to fuel a nuclear submarine (Iran has none), but not to make a weapon. Oh such fun.