Article III justices currently serve "during good behavior," effectively for life. Vacancies arise unpredictably, sometimes producing two or three appointments in a single presidential term and none in another. Recent proposals — most prominently the Presidential Commission on the Supreme Court of the United States (2021) — have suggested 18-year staggered terms that would create a vacancy every two years, ensuring each president gets two appointments per term.
Proponents argue regular vacancies would lower the stakes of any single confirmation, reduce strategic retirement and death gambling around presidential cycles, and align the Court with peer constitutional courts that almost universally use term limits. Most propose senior-justice status (similar to senior judges on lower courts) for retired justices.
Critics argue that life tenure protects judicial independence, that term limits would require a constitutional amendment given Article III's good-behavior clause, and that statutory work-arounds risk constitutional crisis. Others argue that term limits would not depoliticize confirmations and might increase the politicization of each scheduled vacancy.