sentences:  Although the PRM was reorganized into the Institutional Revolutionary Party in 1946, the basic structure was retained.Cárdenas's calculation that the military's incorporation into the PRM would undermine its power was essentially correct, since it disappeared as a separate sector of the party, but was absorbed into the “popular” sector.The organizational change in the PNR to the PRM, and later the PRM to the PRI, were "imposed by Mexican presidents without any discussion within the party."