Three months after his effort to retool the state's healthcare system ran aground, Gov. Arnold Schwarzenegger said he still has an obligation to try to make healthcare available to Californians who lack coverage. His staff is working with healthcare advocates to fix the previous plan, even as the state faces a multibillion-dollar budget deficit, Schwarzenegger said in an interview. He added that he is not willing to break apart the plan to tackle only children's healthcare or address problems with the state insurance plan for the poor.