Although he broke with the Communist party in 1937 or 1938 (his later accounts would vary) the 1939 Hitler-Stalin
non-aggression pact was reportedly the final straw in turning Chambers against the Soviet Union. He saw the pact as a betrayal of Communist values, and was also afraid that the information he had been supplying to the Soviets would be made available to Nazi Germany.
In September of 1939, at the urging of anti-Communist, Russian-born journalist, Isaac Don Levine, Chambers and Levine met with Assistant Secretary of State
Adolf Berle at Berle's home. Chambers was afraid that he would be found out by Soviet agents who had penetrated the government if he were to meet at the State Department. Levine had told Chambers that
Walter Krivitsky had begun informing to American and British authorities concerning Soviet agents who held posts in both governments. Chambers agreed to reveal what he knew on the condition of immunity from prosecution.
At the meeting, Chambers named eighteen current and former government employees as spies or Communist sympathizers. Many of the names he mentioned held relatively minor posts or were already widely suspected of being Communists. Other names were more significant and surprising, however: Alger Hiss, Donald Hiss and Laurence Duggan, all respected midlevel officials in the State Department; Lauchlin Currie, a special assistant to
Franklin Roosevelt. Another member of the ring was said to be working on a top secret bombsight project at the Aberdeen Proving Grounds.
There was little immediate result to Chambers's confession. He chose not to produce his envelope of evidence at this time, and Berle thought his information was tentative, unclear and uncorroborated. Berle took the information to the White House, but the President dismissed it, apparently with little objection from Berle.
Berle notified the
FBI of Chambers's information in March of 1940. In February of that 1941 the Soviet defector Walter Krivitsky was found dead in his hotel room. The death was ruled a suicide, but it was widely speculated that Krivitsky had been killed by Soviet intelligence. Worried that the Soviets might try to kill Chambers too, Berle again told the FBI about his interview with Chambers, but the FBI took no immediate action. Although Chambers was interviewed by the FBI in May of 1942 and June of 1945, it wasn't until November 1945, when
Elizabeth Bentley defected and corroborated much of Chambers's story, that the FBI began to take him seriously.