OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has affirmed the Financial Strength Rating of A++ (Superior) and the Long-Term Issuer Credit Rating of “aaa” of The Northwestern Mutual Life Insurance Company (Northwestern Mutual), and its subsidiary, Northwestern Long Term Care Insurance Company. The two companies are domiciled in Milwaukee, WI, and collectively are known as Northwestern Mutual Group (NMG). Concurrently, A.M. Best has affirmed the Long-Term Issue Credit Ratings of “aa” on Northwestern