The Court is using the Constitution to ban transgender girls from girls’ sports.
The strongest case for the majority runs through Title IX and the constitutional doctrine ofsex-segregated programs. The 1972 statute expressly authorizes separate teams for boys and girls; the implementing regulations have long distinguished on biological grounds. Sex-segregated teams are a long-standing statutory accommodation. The constitutional test the Court applies to sex-based classifications is intermediate scrutiny, established in Craig v. Boren, 429 U.S. 190 (1976). The biological differences the State cites — bone density, muscle mass, hemoglobin levels, the height and weight distributions at athletic maturity — are real, measurable, and on average significant. The Court has been appropriately cautious about forcing the lower courts into a quasi-empirical role of adjudicating individualized athletic exemptions for every transgender athlete claiming hormone therapy. The dissent’s call for fact-finding on remand, Justice Sonia Sotomayor writes, would have required the lower courts to weigh athletic-performance studies and clinical evidence about the residual effects of puberty-blocking treatment — a domain where the political branches have superior fact-finding capacity. The deferential posture is defensible.
That same test, applied in the opposite direction, has invalidated sex-based classifications before. In Mississippi University for Women v. Hogan, 458 U.S. 718 (1982), the Court struck down Mississippi’s exclusion of men from a state nursing school, holding that the administrative difficulty of accommodating individualized circumstances does not justify categorical exclusion. The B.P.J. majority invokes the same test to constitutionalize a categorical rule that excludes a class of athletes from competition regardless of individualized evidence, and did so on a record that included B.P.J. specifically — a transgender girl the majority itself describes as having “limited [her] biological advantage by taking puberty blockers or hormones,” and who won a state championship in girls’ shot put. The application is mechanical. The holding is categorical. The dissent’s request was for the lower courts to look at this record. The majority declined.
The doctrinal architecture the majority deploys collapses at three points.
The first is the “safety” interest. Justice Brett Kavanaugh, writing for the 6-3 majority, joins the “interests in safety and competitive fairness” as a single, inseparable justification. In the context of high school contact sports, the safety interest has a literal, empirical foundation. In the context of middle school track and field — the actual arena of B.P.J.’s case — the safety interest is a phantom. The administrative record contains no evidence of transgender girls causing physical injury to cisgender girls in middle school athletics. The Court is endorsing a state interest that exists in this specific factual posture only as a rhetorical vehicle to smuggle in the competitive-fairness rationale.
The second is the retreat to administrative inconvenience. The Court accepts the State’s premise that individualized medical assessments for transgender athletes on puberty blockers are unworkable for schools. But in United States v. Virginia, 518 U.S. 515, 533 (1996), the Court held that sex-based classifications cannot rely on overbroad generalizations about the class, and that the administrative burden of a school district does not override a student’s constitutional right to equal treatment. The majority has quietly inverted the doctrine: the state’s logistical difficulty is now the constitutional justification for the exclusion.
The third is the treatment of Bostock v. Clayton County, 590 U.S. 644 (2020). The majority writes that “Title VII concerns employment, whereas Title IX as relevant here focuses on sports. The two factual contexts are vastly different.” That is a policy distinction. It is not a textual distinction. Bostock established that discrimination against a person for being transgender is inextricably linked to discrimination because of sex — a textual premise that runs the same way under Title IX that it ran under Title VII. Kavanaugh, who wrote separately in 2020 to argue that Congress, not the Court, should extend such protection, is now walling off the institution of sports from the rest of antidiscrimination law to preserve a categorical exclusion. Textualism was deployed to extend protection in Bostock by one coalition of justices; the same textualism is now being set aside, by a coalition that includes several Bostock dissenters, in favor of a contextual move that contracts protection. The direction of the methodological shift tracks the direction of the result.
The vocabulary the majority chose is the substantive doctrinal choice. The opinion and the editorial page that celebrates it use the same descriptive terms: “biological males” and “biological females.” The frame pre-resolves the empirical question the dissent wanted litigated. If “biological males” describes an immutable class, the question of whether B.P.J.’s medical intervention has changed the relevant physical characteristics is closed before the lower courts see the record. The Court has constitutionalized the binary. The editorial board calls that a feature.
The downstream effects are predictable. The same logic will reach bathrooms and locker rooms, women’s prisons and domestic-violence shelters, rape-crisis centers and women’s health clinics. A judicial carve-out for sports doesn’t insulate those spaces; it guarantees the next legal assault will target the showers.
The Court frames the result as a defense of state autonomy. It is the same autonomy shell the Court deploys when it strikes down federal regulatory authority in the name of the states, only to use the federal judiciary to impose a national constitutional mandate. A true autonomy ruling would hold that the federal government lacks the statutory authority to impose a national rule. Instead, the Court has issued a sweeping federal constitutional ruling validating a state’s sex-based classification against an Equal Protection challenge. It is establishing a national precedent that “competitive fairness” permits states to categorically exclude a disfavored class from public accommodations. The ruling does not protect women’s sports; it uses the female athletic category as a wedge to hollow out equal protection.
B.P.J. won a state championship in girls’ shot put. The Court has constitutionalized the proposition that she is, for purposes of girls’ sports, too male to compete with other girls. The dissent wanted the lower courts to look at the record. The majority refused.