MARY MCCORMACK GUEST-STARS IN THE FIRST OF A FOUR EPISODE ARC AND JOSH FEELS JABBED OVER JOB LOSS AS PRESIDENT HEADS TO DICEY TRADE SUMMIT; CAST'S RICHARD SCHIFF DIRECTS -- On the eve of the President's (Martin Sheen) visit to a controversial trade summit in Brussels, Josh (Bradley Whitford) feels torn when he learns that free-trader Bartlet will reverse his position about sacrificing American jobs to foreign lands -- while C.J. (Allison Janney) takes out her frustrations with a new FCC ruling allowing multimedia companies increased ownership of TV stations. As the administration fights to spin the job-loss fallout, Donna (Janel Moloney) tells Josh about her dissatisfaction with her limited role on his staff. In the midst of it all, Kate Harper (guest star, Mary McCormack "K Street," "Private Parts") steps in as the brash new Deputy National Security Advisor. John Spencer, Richard Schiff (who also directs the episode), Dule Hill, Joshua Malina and Lily Tomlin also star. TV-PG