Home Administration Gary Cohn says Trump trade adviser the only economist in world who... Administration Gary Cohn says Trump trade adviser the only economist in world who believes in tariffs By jbowden@thehill.com John Bowden - March 13, 2019 14 0 SHARE Facebook Twitter President Trump’s former economic adviser Gary Cohn took aim at Trump’s trade adviser Peter Navarro on Wednesday by referring to Navarro as the only Ph.D-holding economist in the world who believes in the effectiveness of tariffs.In an…