Possible Clues:

• 1950's Communist-hunting grp.
• Grp. that questioned Alger Hiss
• R.M.N. was a member of it
• Anti-Red grp.
• McCarthy-era hearings grp.
• 1950's Red-hunting grp.
• Sen. McCarthy's grp.
• Communist-hunting grp. of the 50's
• McCarthy-era org.
• Red Scare gp.