During a Chicago news conference Friday, President-elect Barack Obama said he had spoken with allthe living presidents since his election last Tuesday. Then he added a joke about former First Lady Nancy Reagan that fell flat. “I didn’t want to get into a Nancy Reagan thing about doing any seances” he said. Shortly after, Obama called the 87-year-old Mrs. Reagan, who is ill, to apologize for his statement. According to Obama spokeswoman Stephanie Cutter, the President-elect “expressed his admiration and affection for Mrs. Reagan that so many Americans share, and they had a warm conversation.” According former White House Chief of Staff Donald T. Regan, Mrs. Reagan did consult an astrologer to help set her husband’s schedule.