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Lawsuit seeks to block Washington's Initiative 638 on transgender athletes

The Guardian reports that parents, TransFamilies and a teachers' union sued in state court Monday over the measure, which is due to take effect December 3.

Published Nov 10, 2026 · 23:13 UTC4 reports

The short version

  • Parents, TransFamilies and the Washington Education Association sued in state court to block Initiative 638.[The Guardian]
  • Voters passed the measure last week, banning transgender girls from women's sports teams and requiring medical documentation of sex.[The Guardian]
  • Plaintiffs argue the measure violates state privacy and equal rights protections, while proponents say it protects fairness in girls' sports.[The Guardian]
  • The measure is due to take effect December 3, and the lawsuit's outcome is not yet reported.[The Guardian]

Key facts

  • Parents of student athletes sued in state court on Monday to block Initiative 638.[The Guardian]
  • Voters passed Initiative 638 last week.[The Guardian]
  • The measure bans transgender girls from women's sports teams.[The Guardian]
  • The measure requires girls to provide medical documentation of their sex before joining women's teams.[The Guardian]
  • The lawsuit was filed by parents of trans and cisgender girls, TransFamilies and the Washington Education Association.[The Guardian]
  • The suit argues the measure violates the state constitution's privacy and equal rights protections.[The Guardian]
  • The measure is due to take effect on December 3.[The Guardian]
  • School officials said earlier this year they were aware of about 10 trans sports players among 200,000 student athletes statewide.[The Guardian]

What remains uncertain

  • The constitutional claims are plaintiffs' allegations and have not been tested in court; the reporting includes no ruling.[The Guardian]
  • Plaintiffs warn the measure could lead to invasive genital examinations; this is their characterization and the reporting does not confirm how it would be applied.[The Guardian]

Sources

Outlet counts describe coverage, not independent confirmation. Reports may share a wire service or original source.