This episode's headline: News Summary; Dueling Over Libel; Dole on the Decit; Passing the Tax Bill. The guests include In New York: DAVID BOIES, CBS Lawyer; DAN BURT, , Westmoreland's Lawyer; In Washington: Sen. ROBERT DOLE, Republican, Kansas; Majority Leader; Reports from NewsHour Correspondents: JUNE MASSELL, in New York. Byline: In New York: ROBERT MacNEIL, Executive Editor; In Washington: JIM LEHRER, Associate Editor; JUDY WOODRUFF, Correspondent