Isaac Don Levine (January 19, 1892 – February 15, 1981) was a 20th-century Russian-born American journalist and anticommunist writer, who is known as a specialist on the Soviet Union.
Later he worked with Whittaker Chambers, a defector from the American Communist Party, to reveal agents in the United States government.
"His experience there was one of the factors that eventually turned him against the [Communist] Party and toward a career exposing the KGB's espionage activities in America and Europe.
[2] In the spring of 1939, Levine collaborated with Walter Krivitsky, a defector from the Soviet intelligence agency KGB, for a series of articles in the Saturday Evening Post.
Together they exposed the horrors of Stalin's regime, including the mass purges and murders of tens of thousands, and the deportation of suspected opponents to internal exile and Siberian camps.
In September 1939, Levine arranged a meeting between Communist Party defector Whittaker Chambers and President Franklin D. Roosevelt's security chief, Adolf Berle.
[8] On December 9, 1948, Levine provided testimony to the House Un-American Activities Committee in the Alger Hiss case, regarding Communist espionage in the US government.