He joined the Communist Party USA at the age of 20.

Adler later admitted being a member of the Communist Party USA.

For the main article to which this is linked see Communist Party USA.

When the Communist Party USA was founded it had almost no black members.

Horowitz was raised by parents who were members of the Communist Party USA.

Trumbo was a member of the Communist Party USA from 1943 until 1948.

He began as a labor activist and became a member of the Communist Party USA.

This was a technique that the Communist Party USA employed.

Sterling belonged to the Communist Party USA in the 1940s.

Unknown to them, a meeting of the Communist Party USA was being held down the street.