In Milk Wagon Drivers Union v. Meadowmoor Dairies, ante, p. 287, we held that acts of picketing when blended with violence may have a significance which neutralizes the constitutional immunity which such acts would have in isolation. When we took this case, 310 U.S. 620, it seemed to present a similar problem. More thorough study of the record and full argument have reduced the issue to this: is the constitutional guarantee of freedom of discussion infringed by the common law policy of a state forbidding resort to peaceful persuasion through picketing merely because there is no immediate employer-employee dispute?

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