ATLANTA — The South has become the first region in the country where more than half of public school students are poor and more than half are members of minorities, according to a new report. The shift was fueled not by white flight from public schools, which spiked during desegregation but has not had much effect on school demographics since the early 1980s. Rather, an influx of Latinos and other ethnic groups, the return of blacks to the South and higher birth rates among black and Latino families have contributed to the change. The new numbers, from the 2008-9 school...