Iran's Foreign Minister Mohammad Javad Zarif, who was the lead negotiator in the 2015 nuclear deal, has resigned. The Zarif announced the resignation on Instagram yesterday. It can only take effect after President Hassan Rouhani accepts it.<br />''<span style="color: #222222;"><br />''Zarif has served as Rouhani's Foreign Minister since August 2013 but he has faced severe criticism from hardliners since the US withdrew from the nuclear deal in May 2018.</span>