Gaines, a former collegiate swimmer turned right-wing activist, has clashed with Biles online while campaigning against transgender women in sports.

Olympian and former University of Utah athlete MyKayla Skinner has weighed in on the social-media spat between Simone Biles and Riley Gaines, saying that she was “belittled” and “ostracized” by Biles, her former teammate. She did not offer specifics.

Gymnast MyKayla Skinner claims Simone Biles mistreated her amid a growing feud over Riley Gaines and transgender athletes in sports.