OLDWICK, N.J.--(BUSINESS WIRE)--A.M. Best has revised the outlook to negative from stable and affirmed the financial strength rating of A+ (Superior) and the issuer credit ratings of “aa-” of the members of CSAA Insurance Group (CSAA), which are CSAA Insurance Exchange (Walnut Creek, CA), CSAA Affinity Insurance Company (Harrisburg, PA), CSAA General Insurance Company (Indianapolis, IN), CSAA Mid-Atlantic Insurance Company of New Jersey (Hamilton, NJ), CSAA Mid-Atlantic Insurance Company (Harri