In commemorating the 20th anniversary of Chief Justice John Roberts’ tenure and as the Supreme Court embarks on its 2025-26 term, an inquiry into the leadership of the Supreme Court emerges. As former Justice Felix Frankfurter once noted, the Chief Justice may appear to wield limited formal authority, being “primus inter pares” or “first among equals” on a bench of nine sovereign justices. This perspective is echoed by former Chief Justice William Rehnquist, who observed that the Chief Justice’s vote “carries no more weight” than that of any other justice, and that any expectation of unity led by a chief is largely illusory. Nonetheless, the ability to “persuade or cajole” is significant, influencing which opinions the court collectively endorses, and thereby adding a nuanced layer of influence beyond ceremonial duties.
Utilizing data from the Supreme Court Database, the analysis by Adam Feldman with Empirical SCOTUS proposes to assess the influence of recent chief justices—Fred Vinson, Earl Warren, Warren Burger, William Rehnquist, and John Roberts—by focusing on three criteria: consensus, leadership, and impact.
- Consensus: Trends show an increasing tendency towards unanimous decisions from Vinson’s 30% to Roberts’ prevailing 42%, indicating a shift towards cooperative rulings.
- Leadership: The chief justice’s assignment of majority opinions, especially in close 5–4 decisions, highlights their unofficial coordination role. Historically, chiefs like Rehnquist and now Roberts have maintained a significant presence in majority decision authorship.
- Impact: While decisions to overturn lower court rulings average upwards of 60%, actual overrulings of previous Supreme Court precedent remain steady but rare, holding at about 2–3% across chief justices’ tenures.
John Roberts, according to Feldman’s constructed index, leads the modern chief justices in composite scores, reflecting his skillful temperance in maintaining court cohesion and decision influence. His style is characterized by a cautious approach to aligning justices, often through strategic opinion assignments. This managerial adeptness aligns with descriptions of Roberts from other circles as a figure of deliberate precision who values the court’s institutional integrity, according to a report from The Guardian.
Ultimately, while Frankfurter and Rehnquist’s views on the limited power of the chief justice in a direct sense hold true, it is the quieter influence, the appeal to consensus and strategic authorship, that marks the tenure of an effective chief. The analysis provides a quantitative framework to appreciate how past chiefs have left their imprint on the Supreme Court’s legacy, emphasizing subtle persuasion over overt command. More details of the analysis can be found in SCOTUSblog’s comprehensive article on the matter.