Black Radical Congress
In March 1998 “Endorsers of the Call” to found a Black Radical Congress included Arturo Griffiths, African-American Human Rights Foundation, Washington, DC.
In 2009 Arturo Griffiths was a contributing editor and a member of the  of the Editorial Collective of Political Affairs, theoretical journal of the Communist Party USA.
Metro DC DSA Public Facbook group
Members of the Metro DC Democratic Socialists of America, public Facebook group, as of March 12, 2017 included Arturo Griffiths.