The court appeared ready to invalidate laws in some two dozen states that bar therapists from practicing a version of therapy that seeks to change a teenager's sexual orientation or gender identity.

The court heard arguments in a case brought by Kaley Chiles, a Christian talk therapist in Colorado, who argues that the state's ban violates her First Amendment rights.

The Supreme Court heard arguments in a case that could strike down bans on so-called conversion therapy for children. Conversion therapy broadly refers to attempts to change a person’s sexual ...