OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has affirmed the Financial Strength Rating (FSR) of A+ (Superior) and the Long-Term Issuer Credit Ratings (Long-Term ICR) of “aa-” of Great American Insurance Company and its pooling affiliates, collectively referred to as Great American Insurance Companies (Great American). Concurrently, A.M. Best has affirmed the Long-Term ICR of “a-” and the Long-Term Issue Credit Ratings (Long-Term IR) of American Financial Group, Inc. (AFG) (Cincinnati, OH) [NYSE/N