This episode's headline: Election '98; Cyber Campaign; Managing Health Care; Time Out; Dialogue. ANCHOR: JIM LEHRER; GUESTS: MARK SHIELDS, Syndicated Columnist; PAUL GIGOT, Wall Street Journal; DAVID ALDRIDGE, ESPN; ROGER NOLL, Stanford University; JUAN WILLIAMS, Author, ""Thurgood Marshall""; CORRESPONDENTS: PHIL PONCE; MARGARET WARNER; ELIZABETH FARNSWORTH;KWAME HOLMAN; TERENCE SMITH; SUSAN DENTZER;DAVID GERGEN