Attached is the NCAA policy.
The biological females can file suit in federal court to make whatever claim they deem appropriate. [You should be confident that a stacked Mitch McConnell Supreme Court will be an eager audience]
It sounds like many of you oppose giving the transgender swimmer a clear competitive advantage per this policy.
Now apply your same standards for fair competition to voting rights. BOOM!
Checkmate.
Link: https://ncaaorg.s3.amazonaws.com/inclusion/lgbtq/INC_TransgenderHandbook.pdf