Dulles’s aggressive Cold War stance found a key ally in President Truman’s defense secretary, James V. Forrestal, a former Wall Street investment banker at Dillon, Read who moved in Dulles’s circles and who shared Dulles’s suspicions about the Soviet Union. In early 1948, Forrestal persuaded the politically vulnerable Truman, who knew he was facing a tough challenge from Dewey, to appoint Dulles to a blue-ribbon committee to study the year-old CIA and propose ways to make it more effective.