WEST HOLLYWOOD, Calif., March 31 — Galvanized politically in ways they have not been since the early 1990's, Hollywood's more liberal producers and writers are increasingly expressing their displeasure with President Bush with not only their wallets, but also their scripts. In recent weeks, characters in prime time have progressed beyond the typical Hollywood knocks against Washington politicians to calling out the president directly or questioning his policies, including the decision to go to war in Iraq, the support of the antiterrorism law and the backing of a constitutional amendment to ban same-sex marriage. On the NBC show "Whoopi," the...