Bill Browder (Magnitsky Act) had a grandfather who was secretary general of the CPUSA. He served two prison sentences in relation to his work with CPUSA, one at Leavenworth. He was one of founders of The Workers World communist magazine. Looks like Bill's bolshevik ties run depp. Watch this deposition, he is an expert at pilpul.
https://www.youtube.com/watch?v=pu9DMxfTGhY