To whom did Whittaker Chambers report as a Communist?

"As a Communist," Whittaker Chambers did not report to much of anyone in particular. He was a regular member during the 1920s, during which he worked at The Daily Worker newspaper in its offices in New York City.

Nor did Chambers remain an official party member for long. He joined in 1925 (as recounted in his 1952 memoir, Witness) but let his membership lapse. In fact, disgusted (as many were) by factional infighting among American communist parties, he moved away from the overall party in the later 1920s.

He first became prominent in 1931 with the publication of the first of four short stories in the influential New Massesmagazine. The story was "Can You Make Out Their Voices," which Hallie Flanagan and a former student at Vassar College adapted into a play within a month ("Can You Hear Their Voices?"). The short stories brought Chambers to the attention of the party -- which then "invited" him to join the Soviet underground for espionage.

Chambers reported to a number of changing rezident(Soviet spy handlers) during his underground years (1932-1938). These he details in his 1952 memoirs, Witness -- interest in which helped make that book a best-seller at the time and which help keep it read to the present.