In the so-called Danbury Hatters’ case, the Supreme Court held that a boycott against a manufacturer of hats, initiated in an attempt to force unionization, was an illegal restraint of trade.
Reacting to a secondary boycott sponsored by the American Federation of Labor, an employer brought suit against individual members of the United Hatters of America. The union claimed that the Sherman Antitrust Act of 1890 was designed for business corporations, not labor unions. Speaking for a unanimous Supreme Court, Chief Justice Melville W. Fuller
Debs, In re
Gompers v. Buck’s Stove and Range Co.
Sherman Antitrust Act