Tehran is betting he will not take the final step to break the stalemate - aggressively enforcing secondary sanctions on the countries keeping its economy afloat, foremost among them China and India. Iranian officials dismiss US strategy as a replay of a playbook that has already failed Key points and original sources are listed below.

• Tehran is betting he will not take the final step to break the stalemate - aggressively enforcing secondary sanctions on the countries keeping its economy afloat, foremost among them China and India.S1

• Iranian officials dismiss US strategy as a replay of a playbook that has already failedS2