For decades, the federal government has used data analysis to ferret out race and sex discrimination, winning court cases and reaching settlements in housing, education, policing and across American life. Now the Trump administration is working to unwind those same cases.In recent weeks, the Justice Department backed out of an agreement with an Atlanta bank accused of systematically discouraging Black and Latino home buyers from applying for loans. The Education Department terminated an agreement with a South Dakota school district where Native American students were disciplined at higher rates than their White peers. And federal prosecutors have dropped several racial...