The Trump administration turned up the heat Friday on George Mason University, Virginia’s largest public school, accusing its president of unlawfully promoting diversity in hiring and promotions. The Education Department notified George Mason that a federal civil rights investigation had found the university had acted unlawfully. It demanded a public apology from the president, Gregory Washington, as well as other corrective actions, within 10 days. The move comes as George Mason, known as one of the most diverse campuses in the country, is also under investigation by the Justice Department for policies that focused on promoting diversity in hiring, as...