Left parties have decided to launch a nationwide campaign against the centre's decision to support IAEA resolution against Iran.
Under the deal, to be ratified by the US Congress, Washington will lift sanctions on dual-use technology trade with India for which New Delhi will have to separate its civilian and military nuclear establishments.
India had gone along with the United States and European Union in voting against Iran at the last IAEA meeting in Vienna in September, triggering strong protests by United Progressive Alliance's left allies.