Headline: Etats-Unis: les frères Koch, pétroleurs anti-ObamaLink: http://www.lexpress.fr/actualite/monde/amerique/etats-unis-les-freres-koch-petro…Publication Date: Tuesday, December 20, 2011Primary Source: L'Express (France)Non-Cato Author: Philippe CosteType: articleFormat: Newspaper (Online)Nature of Mention: mentionedScholar: CatoResearch Area: Government and PoliticsSubjects: the Koch Brothers & Obama