In the case of International Union, United Mine Workers of America v. John L. Bagwell et al., 1993, the U.S Supreme Court ruled that fines imposed on a union for violating an injunction during a strike were criminal rather than civil penalties and thus required a jury trial under the Sixth Amendment. The court held that because these fines were punitive in nature and aimed at deterring future conduct rather than compensating for losses caused by past behavior, they constituted criminal contempt sanctions which necessitated full procedural protections including right to notice and hearing before an impartial judge or jury. This decision marked a significant shift in how labor disputes involving contempt charges are handled within the judicial system.

In the dissenting opinion for International Union, United Mine Workers of America v. John L. Bagwell et al., Justice Blackmun argued that the majority's decision to classify fines imposed on a union for violating an injunction during a strike as criminal rather than civil was incorrect and could have far-reaching implications. He contended that this classification would potentially limit courts' abilities to enforce their orders effectively in future labor disputes or other cases involving ongoing conduct violations. In his view, these were not fixed-sum fines meant to punish past behavior but coercive measures designed to ensure compliance with court orders moving forward - thus they should be considered civil contempt sanctions instead of criminal ones.