“A confidential message from FBI Director J. Edgar Hoover, reproduced in [Diana] West’s new book, told [White House aide Harry] Hopkins that a ‘continuing’ investigation had discovered that Russian diplomat (and Comintern agent) Vasily Zarubin had made a payment to U.S. Communist Party official Steve Nelson to help place espionage agents ‘in industries engaged in secret war production … so that information could be obtained for transmittal to the Soviet Union.’ This information had come from a ‘bug’ at Nelson’s home in Oakland, California, through which the FBI first learned of the Soviet effort (code-named ‘Enormous’) to obtain the atomic...
