The closest argument that I can find in the US is Title 42 Title 21 subsection 1985(3) it basically says that two or more people cannot conspire to deprive someone of a constitutionally protected right such as speech, association or voting. But the courts have ruled that the person who is claiming this violation must pass a 4 part test:
(1) a conspiracy; (2) for the purpose of depriving, either directly or indirectly, any person or class of persons of the equal protection of the laws, or of equal privileges and immunities under the laws; and (3) an act in furtherance of the conspiracy; (4) whereby a person is either injured in his person or property or deprived of any right or privilege of a citizen of the United States.
In Tauvar v Bar Harbour Congregation of Jehovah's Witensses the court ruled: