The article itself actually covers this point a bit: > Cannon said use of the phrase "dark money groups" when referring to 501(c)(4) organizations "often revea

The article itself actually covers this point a bit: > Cannon said use of the phrase "dark money groups" when referring to 501(c)(4) organizations "often reveals a stunning level of ignorance." Cannon pointed to the Supreme Court's 1958 ruling in NAACP v. Alabama, which held that the NAACP did not have to provide its membership lists to the state. The court decided that "compelled disclosure of affiliation with groups engaged in advocacy may constitute... a restraint on freedom of association."