The People’s Mujahedin of Iran, or MEK, which the United States had previously designated as a terrorist organization and is known for assassinations and bombings it has carried out, is virulently opposed to US-Iran diplomacy. In March 2021, a number of US Senators attended a virtual event organized by the MEK-aligned Organization of Iranian American Communities (OIAC) calling for continued US sanctions and “bringing down the regime.” Senator Bob Menendez, the powerful chair of the Senate Foreign Relations Committee, was among several Democrats in attendance.