Fueled by social injustice and a changing of the guard, Run the Jewels claps back with both mics blazing. 3 boils over with ruthless disses, thunderous bass, and pinpoint scratches. The guest list is thick. Kamasi Washington adds mournful horn. Zack de la Rocha returns with a 16-bar salute. Trina, Danny Brown, Tunde Adebimpe, and BOOTS join the (revolutionary) party. On “A Report to the Shareholders,” Killer Mike recounts his time running through the election-year minefield as a social and political activist.