Mealey's (January 30, 2020, 1:44 PM EST) -- PHILADELPHIA — A federal judge in Pennsylvania on Jan. 27 declared that a directors and officers liability insurer has a duty to defend its insureds against an underlying shareholder derivative lawsuit, rejecting the insurer’s argument that the policy’s “related acts” provision and “prior acts” exclusion bar coverage (Robert Vito, et al. v. RSUI Indemnity Company, No. 19-2468, E.D. Pa., 2020 U.S. Dist. LEXIS 14724)....