For years, the actor Ron Silver was a partisan Democrat - a one-time president of the Actors' Equity union and co-founder, with colleagues like Susan Sarandon and Christopher Reeve, of the Creative Coalition, which encouraged left-leaning political activism among celebrities. His best known screen role may be that of Bruno Gianelli, the Machiavellian political consigliere to Democratic President Jed Bartlet on TV's popular series "The West Wing." Everything changed for Silver after the Sept. 11, 2001, terrorist attacks. Now he calls himself a "9/12 Republican." A strong supporter of Israel and the war in Iraq, Silver spoke at the Republican...