From the March 3 New York Times:
Mr. Obama addressed the traits he would look for in a Supreme Court justice, suggesting he might leaven legal scholarship with practical political experience. He held up Earl Warren, a former governor of California and the former chief justice, as an exemplar.
Mr. Warren, he said, had had the wisdom to recognize that segregation was wrong less because of precise sociological effects and more so because it was immoral and stigmatized blacks.