John Kerry’s Red Roots: Richard Kerry’s Left-Wing Legacy
A 1945 FBI wiretap investigation of leaks from the Soviet ambassador to journalist Drew Pearson revealed that Frankfurter was colluding with Pearson. Follow-up wiretaps on Pearson and Brandeis-Frankfurter apparatus member Thomas Corcoran revealed that Corcoran and Rauh-Prichard-Graham Goon Squad member Laughlin Currie had conspired to protect State Department official John Stewart Service from being prosecuted in connection with the leaking of classified government documents to the pro-Communist publication Amerasia.11
Theoharis and Cox, 258-269, esp. 266; John Earl Haynes, Red Scare or Red Menace? American Communism and Anticommunism in the Cold War Era, Chicago: Ivan R. Dee, 1996, 52-55; Romerstein and Breindel, 168
Anderson also had a close relationship with Johnny Rosselli and some other mob guys. What I've read leads me to believe they would leak him political dirt that he would use in his investigative reporting.
I still sonder why the FBI was so hot to get Jack Anderson's papers from his family. What secrets lie therein? This issue faded quickly from the headlines.
http://deseretnews.com/dn/view/0,1249,650220234,00.html