US conservatives and Israel stepped up pressure this week against the possibility that an agreement to restore the Iran nuclear deal could see Washington drop its “terrorist group” designation of the Iranian Revolutionary Guard Corps. The IRGC, one of the most powerful forces in Iran, was officially branded a “foreign terrorist organisation” by the administration of president Donald Trump in 2019, a move that came on top of his decision the previous year to repudiate the 2015 six-party accord that put limits on Iran’s nuclear program Sources close to the negotiations in Vienna have said that o…