In Dayton Board of Education v. Brinkman (1977) 433 U.S. 406, a school desegregation case, the court once more noted that racial isolation by itself "is not a violation of the Fourteenth Amendment in the absence of a showing that this condition resulted from intentionally segregative actions." (P. 413.) District courts may exercise power over school districts only on the basis of a constitutional violation which results from action by a school board which is intended to, and does in fact, discriminate against minorities. (P. 420.)