Activist Riley Gaines responded to gymnast Simone Biles after their heated social media exchange about transgender athletes in women's sports.

Olympic champion Simone Biles and conservative activist Riley Gaines clashed on social media over transgender athletes.

Simone Biles took former U.S. NCAA swimmer Riley Gaines to task on Friday, after the now-conservative activist “bullied” a transgender teen athlete. On X, the Olympic gold medalist, 28, dubbed 25-year-old Gaines “truly sick” and a “sore loser” after Gaines misgendered a high school softball player.