Subpoena demands Exxon correspondence with Heritage, Cato, Mercatus, Hoover, and Reason, among others The attorney general of the U.S. Virgin Islands is targeting dozens of conservative and libertarian organizations in a racketeering lawsuit against climate change skeptics that has been widely described as an effort to silence political opponents. In a subpoena issued in March, the office of USVI attorney general Claude Walker demanded from Exxon Mobil copies of communications between the oil company and 90 different political and policy organizations “and any other organizations engaged in research or advocacy concerning Climate Change or policies.”