A transgender high school student was pushed into the national spotlight this week after President Donald Trump threatened to withhold federal funding from California over her participation in this weekend’s California state track and field championships .

In February, Trump signed an executive order titled “Keeping Men Out of Women’s Sports,” which gave federal agencies the ability to penalize schools for allowing transgender athletes to compete — something the Trump administration says violates Title IX, the federal civil rights law that prohibits sexual discrimination.

The investigation focuses on a state law that allows students to participate in school programs like sports teams that match their gender identity.