In ripping Dane County Judge Juan Colas as “activist” for striking down key portions of the law ending most public-sector collective bargaining, Gov. Scott Walker is just the latest lawmaker to blame the ref for his own poor play….Donald Downs, a UW-Madison law professor, doubted the courts would look favorably on a First Amendment challenge to the law ? i.e., that restricting collective bargaining restricts union members? freedom of association. An equal protection argument ? that the law discriminates against some union workers because it doesn?t apply to public safety employees ? could get more traction, he said.