An antilabor Supreme Court majority severely curtailed labor union activity by limiting the protections granted to these organizations by Congress.
Justice Mahlon Pitney
Justices Louis D. Brandeis, Oliver Wendell Holmes, and John H. Clarke dissented in Duplex Printing, arguing that the Court was ignoring a legitimate congressional power to enact legislation that stipulated that labor unions were not monopolies in the usual sense of the word. Duplex Printing was effective for more than a decade until the Great Depression dramatically changed public and legal opinion. The leading dissenters later saw their views become the law of the land. When Congress adopted prounion legislation such as the 1932 Norris-La Guardia Act, the New Deal era Court upheld exempting labor unions from antitrust legislation.
Separation of powers