After a transgender high school athlete won two events at last weekend's California track and field championships, President Donald Trump has threatened to defund the state. Katie Barnes, ESPN senior writer covering the intersection of sports and gender, and author of Fair Play: How Sports Shape the Gender Debates (St. Martin's Press, 2023), discusses the controversy surrounding trans women in competitive sports, fact-checks ideas the broader public holds about fairness and gender in athletics, and talks about current rules various leagues already set in place to ensure equity and inclusion.