An American Civil Liberties Union lawyer will make history in December as the first openly transgender attorney to argue before the U.S. Supreme Court, opposing Tennessee’s Republican-backed law banning gender-affirming medical care for transgender minors. The ACLU’s Chase Strangio, 41, represents a group of transgender people who pursued a lawsuit challenging the measure that prohibits medical treatments including hormones and surgeries for minors experiencing gender dysphoria. In one of the most consequential cases of the court’s current nine-month term, the nine justices will hear arguments on Dec. 4 in an appeal by President Joe Biden’s administration of a lower court’s decision upholding Tennessee’s ban.