How workers mobilized to resist the McCarthyite witch hunt – The Militant

....Behind the general smoke screen of anti-communism, one of the most sinister anti-union bills was introduced into the Senate in April 1953 by Senator John Marshall Butler, Maryland Republican. He had been elected with Senator Joseph McCarthy’s direct aid. Butler’s bill required the National Labor Relations Board to deny collective bargaining recognition or elections to any union under “investigation” by the Subversive Activities Control Board set up under the McCarran-Kilgore Act of 1950. Such investigation and denial of NLRB certification were to be based on any employer’s mere complaint that a union seeking collective bargaining rights was “communist dominated.” If the Subversive Board should “find” against the union, the latter would be permanently banned by the NLRB unless and until such a ruling was reversed by a regular federal court.

How workers mobilized to resist the McCarthyite witch hunt – The Militant