Ex- (MA) Senate President Stanley C. Rosenberg and his estranged husband are being targeted for damages in a civil lawsuit by a former Beacon Hill legislative aide who says Bryon Hefner sexually abused him — twice in Rosenberg’s presence, and once at the couple’s North End condo. The explosive 16-page lawsuit was filed in Suffolk Superior Court by attorney Mitchell Garabedian on behalf of “John Doe.” Doe’s true identity was immediately impounded by Judge Debra A. Squires-Lee. He is identified only as a resident of Middlesex County who worked as a legislative aide for the House of Representatives. “The court...