Sacramento -- Gov. Arnold Schwarzenegger, taking advantage of a technicality in campaign finance laws, has been collecting rent from political action committees that he controls. During the past three years, campaign committees controlled by Schwarzenegger have paid $166,859 in rent to Main Street Plaza, a three-story building in Santa Monica that the governor owns. Bob Stern, an expert in campaign finance law who helped write the state's Political Reform Act of 1974, described the rental arrangement as "taking advantage of a ridiculous loophole'' in the law. The governor is able to accept the rent only because Main Street Plaza --...