Possible Clues:

• Censorship-fighting org.
• First Amendment supporter
• Bill of Rights advocate
• ''. . . card-carrying member of the ___''
• Grp. co-founded by Helen Keller
• Org. that sued the NSA in 2013
• Bill of Rights defender: Abbr.
• Bill of Rights-defending org.
• Anti-censorship org.
• Civil rights gp.