~~~~~~~~~~~
n June 1946, Vernon Jarrett was elected to the Illinois Council of the Communist Party’s youth wing, then known as American Youth for Democracy. This is according to Testimony of Walter S. Steele regarding Communist activities in the United States.
Hearings before the Committee on Un-American Activities, House of Representatives, Eightieth Congress, first session, on H. R. 1884 and H. R. 2122, pages 75,76. It is the first hard evidence tying Vernon Jarrett directly to the Communist Party. Frank Marshall Davis, incidentally, was an official sponsor of American Youth for Democracy, along with confirmed communists Howard Fast, Langston Hughes, John Howard Lawson and Dirk Struik.
In April 1948, Frank Marshall Davis and Vernon Jarrett were working together as members of the publicity committee of the communist controlled Citizens’ Committee to Aid Packing-House Workers.
(photo below from Trevor Loudon)
CCAPHW letterhead, April 12 1948 
Besides Davis and Jarrett, communist officials of the strike committee included Oscar Brown (Treasurer) , Louise Patterson (Assistant Treasurer) and Ishmael Flory (food & groceries committee).