Saying the fight over Atlanta’s affirmative action program has becometoo political, the only black member of the Southeastern Legal Foundation’slegal advisory board resigned Thursday.

Larry D. Thompson, a former U.S. Attorney appointed by Ronald Reagan,became the third person to cut ties with the conservative legal foundationin two days. Two businessmen resigned from the group’s board of trusteeson Wednesday after the Georgia Black Chamber of Commerce targeted theircompanies for boycotts.