Advocacy for Principled Action in Government; American Arab Anti Discrimination Committee; American Civil Liberties Union; American Library Association; Association of Research Libraries; Bill of Rights Defense Committee; Brennan Center for Justice; Center for Democracy & Technology; Center for National Security Studies; Constitutional Alliance; The Constitution Project; Council on American Islamic Relations; Cyber Privacy Project; Defending Dissent Foundation; Demand Progress; DownsizeDC.org; Electronic Frontier Foundation; Fight for the Future; Freedom of the Press Foundation; FreedomWorks; Free Press Action Fund; Government Accountability Project; Hackers/Founders(4/20/2015)