New Yorker Discussion Agenda: Jill Lepore, "The Force," The battle over military spending, Jan. 28., pp. 70-76. Thomas Mallon, "Wag the Dog," The speech that made Richard Nixon, Feb. 4, pp.68-74. Nicole Krauss, "Zusya on the Roof," Short story, Feb. 4, pp.62-67. The New Yorker discussion will last from an hour to an hour and a half and will be followed by a discussion of John Dos Passos's, "The Big Money."