Lia Thomas

“University of Pennsylvania swimmer Lia Thomas became the first transgender NCAA champion in Division I history after winning the women's 500-yard freestyle in Atlanta… Thomas competed on Pennsylvania's men's team for three years before transitioning and moving to the women's team.” (Reuters)

The right argues that it is unfair to allow biological males to compete in women’s leagues.

The left generally argues that transgender athletes should be permitted to compete in the league that matches their gender identities.