SACRAMENTO – Gov. Arnold Schwarzenegger said yesterday he wouldn't fire his top staffer, Democrat Susan Kennedy, to appease Republican activists worried about his move toward the middle. "I will hire the people I want to hire because they are the best," he said. "I will keep Susan Kennedy exactly where she is." Schwarzenegger discussed a wide range of issues during his appearance at the Sacramento Press Club, saying voters should decide whether California enacts a physician-assisted suicide law and pledging to release his tax returns for the past 10 years. During his career before he became governor, Schwarzenegger said, "90...