Scholars have made important advances in explaining policy drift, uncovering the prevalence of drift in veto-riddled systems, the importance of bureaucratic discretion and statutory ambiguity in combatting drift, and its feedback effects. Despite research demonstrating the potential for judicial action to alleviate drift, we know little about the potential for the Supreme Court to facilitate policy drift. I argue that the Supreme Court may operate as a powerful agent of drift by stripping statutes of ambiguity, foreclosing policy innovation in institutions outside of Congress, and curtailing bureaucratic discretion and authority. To demonstrate these mechanisms, I show how in the case of federal labor law, the Court’s jurisprudence addressing the right to strike, federal preemption, and National Labor Relations Board authority played a central role in gradually undoing the efficacy of The National Labor Relations Act. This inquiry has important implications for understanding public policy, judicial power, the development of American labor law, and American democracy.