Gaines' extensive history of attacking transgender (and cisgender) women in sports led Biles to call her a "bully" in an X post.

Swimmer and conservative activist Riley Gaines continued her beef with Olympic gymnast Simone Biles in a pregnancy announcement, sparking discussion on social media. The two athletes exchanged heated words on social media after Biles called out “truly sick” comments made by Gaines about a transgender athlete.