This episode's headline: Affirmative Action; Politics of Peace; Essay. ANCHOR: ELIZABETH FARNSWORTH; GUESTS: SEN. JEFF SESSIONS, [R] Alabama; SEN. PATRICK LEAHY, [D] Vermont; WARD CONNERLY , Proposition 209 Proponent; MAYOR WILLIE BROWN, San Francisco; CORRESPONDENTS: CHARLES KRAUSE; SPENCER MICHELS; ROGER ROSENBLATT;