OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has assigned a Financial Strength Rating of C- (Weak) and a Long-Term Issuer Credit Rating (Long-Term ICR) of “ccc-” to United Security Assurance Company of Pennsylvania (United Security) (Souderton, PA). The outlook assigned to these Credit Ratings (ratings) is stable. The ratings reflect United Security’s balance sheet strength, which A.M. Best categorizes as very weak, as well as its marginal operating performance, very limited business profile and w