A federal judge in Washington, D.C., grappled over whether to block the Trump administration’s rollback of health care protections for LGBTQ individuals, raising another court ruling that threw out a previous version of the challenged rule and the U.S. Supreme Court’s recent opinion on worker safeguards on the basis of gender identity.

U.S. District Judge James Boasberg heard arguments Monday in the lawsuit filed by Lambda Legal and Steptoe & Johnson LLP attorneys on behalf of LGBTQ groups and health care providers challenging the administration’s revised rule that removed a definition of sex discrimination from the Affordable Care Act that applied to transgender people.