One link on a website does not an "arm" make.
How about, "MoveOn.Org is the an activist arm of the Communist Party USA??? You said as much yourself, no?
I don't suppose moveon.org could disassociate themselves from their idealogical comrades at cpusa if in fact they disagree with their idealogy? To steal a phrase, they're both useful idiots; tools in the march towards the workers' paradise.
FGS
Long live the revolution !!< /sarcasm >