Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Iran's Domestic, Diaspora Critics Differ on How Biden May Counter Tehran's Objectionable Behavior Michael Lipin WASHINGTON - Prominent Iran-based and Iranian diaspora critics of Tehran's Islamist rulers have differing expectations about how far U.S. President Joe Biden will go to implement his promised new approach to dealing with Iran's objectionable behavior. Biden, who took office on Wednesday, has vowed'¯to use diplomacy in coordination with U.S. allies to try to rejoin the Joint Comprehensive Plan of Action, the 2015 deal in which world powers offered Iranian leaders sanctions relief in return for curbs on nuclear activities that could be diverted into weapons production. Former President Donald Trump withdrew from the JCPOA in 2018, saying it was not tough enough on Iran, and unilaterally tightened U.S. sanctions aimed at pressuring Tehran into scrapping its nuclear program and other activities deemed a threat to the U.S. and its allies. Tehran has vowed to defy what Trump called his "maximum pressure" policy and has denied seeking nuclear weapons. The Biden administration has said Iran must stop the escalating series of JCPOA violations that it began in retaliation for the 2018 pullout and return to compliance before the U.S. also returns to the deal. Tehran has said Washington should make the first move by easing sanctions. Other world powers, including U.S. allies in Europe, have called on both the U.S. and Iran to fully recommit to the 2015 agreement. Some of Tehran's Iran-based and Iranian diaspora critics who appeared in VOA Persian's TV coverage of Biden's Wednesday inauguration said they expect him to be more aligned with European powers than was Trump in responding to Iran's nuclear deal violations. Ali Vaez, an Iran analyst at the International Crisis Group, said Biden is likely to take the initiative by signing an executive order rescinding Trump's 2018 nuclear deal pullout. .