 In his role as presidential adviser, one of his most significant contributions was his successful advocacy, along with David Niles, of prompt 1948 recognition of the new Jewish state of Israel, over the strong objections of Secretary of State General George Marshall.Of similar importance, with the input of senior officials in the Departments of State, War, and Justice, the Joint Chiefs of Staff, and the Central Intelligence Group, and utilizing the expertise of George F. Kennan and Charles Bohlen, was his preparation, along with George Elsey, of the top secret Clifford-Elsey Report for President Truman in 1946.That report, solicited by the President, which detailed the numerous ways in which the Soviet Union had gone back on its various treaties and understandings with the Western powers, along with Kennan's X Article in "Foreign Affairs", was instrumental in turning U.S. relations toward the Soviet Union in the direction of a harder line.