Donald Trump Jr. on Monday to condemn the victories on X, formerly Twitter, to his 10.7 million followers.The debate over transgender athletes is a focal point in America's culture wars.
Last year, the University of Pennsylvania's Lia Thomas became the first openly transgender athlete to win an NCAA swimming championship.
Thomas' victory sparked a heated national debate over her participation. In April, the U.S. House passed the Protection of Women and Girls in Sports Act.
The bill however, didn't get through the Democratic-controlled Senate.The eldest son of former President Donald Trump wasn't the only influential figure taking to X in speaking out against Sunday's Cyclocross result.Swimmer Riley Gaines, a vocal critic of transgender women competing in female categories, along with tennis legend Martina Navratilova, also took aim at the event.Trump Jr.