The Supreme Court on Tuesday is set to consider whether states can forbid transgender athletes from competing on girls' and women's sports teams, stepping into a high-stakes fight that has been simmer...

At least half of the states in the nation have bans on transgender students competing in sports according to their gender identity, a USA TODAY review of state laws and policy documents found.

"Idaho's law classifies on the basis of sex, because sex is what matters in sports," said Alan Hurst, the Idaho solicitor general who argued for the state.