Felix Frankfurter,
Hughes v. Superior Court of California in and for County of Contra Costa…
“ The California Supreme Court suggested a distinction between picketing to promote discrimination, as here, and picketing against discrimination: 'It may be assumed for the purposes of this decision, without deciding, that if such discrimination exists, picketing to protest it would not be for an unlawful objective.' 32 Cal.2d at 855, 198 P.2d at 888. We cannot construe the Due Process Clause as precluding California from securing respect for its policy against involuntary employment on racial lines by prohibiting systematic picketing that would subvert such policy. ”
