In the United States v. Swift & Co., et al., 1931, the Supreme Court dealt with an antitrust case involving a group of meat packers who were accused of conspiring to control and manipulate prices in violation of a previous consent decree. The defendants argued that they had not violated any laws because their actions did not directly affect interstate commerce. However, the court rejected this argument stating that such restrictive agreements could indirectly impact interstate trade by controlling supply and manipulating prices which was against public policy as it restrained free competition. Furthermore, the court held that even if there was no direct effect on interstate commerce at present, potential future effects must also be considered under anti-trust laws. Therefore, it upheld lower courts' decisions finding these companies guilty for violating anti-trust regulations.

In the dissenting opinion for United States v. Swift & Co., it was argued that the court overstepped its bounds by imposing a permanent injunction on Swift & Co. The justice believed this decision went beyond what was necessary to remedy the violation of antitrust laws, and instead constituted an unwarranted interference in business operations. They contended that once illegal practices were stopped, there should be no further intrusion into how businesses conduct their affairs unless new violations occur. Furthermore, they expressed concern about potential abuse of judicial power if courts could indefinitely regulate businesses based on past transgressions rather than current or ongoing illegal activities.