This episode's headline: Bowing Out; Election Turmoil; Drilling for Scholars; Dialogue. ANCHOR: JIM LEHRER; GUESTS: MARK SHIELDS, Syndicated Columnist; PAUL GIGOT, Wall Street Journal; ELIZABETH ARNOLD, National Public Radio; JEFFREY WINTERS, Northwestern University; SIDNEY JONES, Human Rights Watch Asia; WILLIAM LIDDLE, Ohio State University; MARIAN WRIGHT EDELMAN, Author; CORRESPONDENTS: TERENCE SMITH; IAN WILLIAMS; MARK AUSTIN; GWEN IFILL; KWAME HOLMAN; SPENCER MICHELS; ELIZABETH FARNSWORTH; ELIZABETH BRACKETT; DAVID GERGEN; RAY SUAREZ; MARGARET WARNER; RICHARD RODRIGUEZ