National Lawyers Guild or American Constitution Society...which has more street cred?
NLG, but possibly because it has much older pedigree. the NLG is 70 years old. it helped integrate the legal profession while the ABA was segregated, flipped off mccarthy, and litigated historic cases like goldberg v. kelly. the ACS has only been around about 5 years.
also, the NLG is more militant, therefore more credible.