FIRST ON FOX – The Department of Justice demanded California’s public high schools confirm by next week that they do not allow transgender athletes to compete in girls’ sports, escalating a federal inquiry into the state over its compliance with Title IX.Assistant Attorney General Harmeet Dhillon, who heads the DOJ Civil Rights Division, said in a letter obtained by Fox News Digital that public school districts must "certify in writing" by June 9 that they will not abide by the the California Interscholastic Federation’s gender identity rules."Knowingly depriving female students of athletic opportunities and benefits on the basis of their