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

Here's what happened: in 2022, Gaines tied for fifth place in a swim meet with Lia Thomas, who is trans. At the time, she seemed to take issue with some of the NCAA rules; over the next few years, however, Gaines became more and more radicalized, and is now one of the leading faces of the anti-trans-women-in-sports movement as well as MAGA.