It is unclear how far Treasury Department officials intend to push the probe — or why they chose to launch it now, more than a year after the lobbying campaign began. But NBC News has obtained one possible clue: A small Pennsylvania-based speakers firm called Speakers Access wrote an email in September inviting a Washington based national security expert to speak at a conference in Geneva, Switzerland "on behalf of our client, National Council of Resistance of Iran, Foreign Affairs Committee." The National Council of Resistance is considered by the Treasury Department to be one of the "aliases" of the MEK and is itself .