But is California's governor really a closet Democrat? The question has been raised by journalists and conservative critics, who never tire of taking note of Schwarzenegger's politically assertive wife, his hiring of Democratic aides, his liberal social values, his championing of public works projects and, of late, his compromises with the Legislature's Democratic leadership on a minimum-wage hike, mandatory prescription drug discounts and a measure to fight global warming. To attempt to answer that question is not to end a conversation but to begin it. Schwarzenegger routinely sides with business and asserts quasi-libertarian views on individual freedom. When the governor...