NEW YORK--(BUSINESS WIRE)--Fitch Ratings has affirmed the 'AA-' rating for the following St. Clair County, MI bonds: --$750 thousand limited tax general obligation (LTGO) bonds, series 2007. The Rating Outlook is Stable. SECURITY The LTGO bonds are secured by the county's full faith and credit and its ad valorem tax pledge, subject to applicable statutory and constitutional limitations. KEY RATING DRIVERS RECOVERING ECONOMY; STABILIZING ASSESSED VALUE: Wealth metrics are on par with the state a