This episode's headline: Where They Stand; Campaign Notebook; Public Opinion; Free- For-All. ANCHOR: JIM LEHRER; GUESTS: PRESIDENT CLINTON; SEN. BOB DOLE; ROSS PEROT; ELIZABETH ARNOLD, National Public Radio; DAVID BRODER, Washington Post; RON BROWNSTEIN, Los Angeles Times; ANDREW KOHUT, Pew Research Center; CORRESPONDENTS: CHARLAYNE HUNTER-GAULT; BETTY ANN BOWSER;