sentences:  Considered a landmark in Latin American literature, it highlighted aspects of Mexican history and its political system.When Alemán became president in 1946, the PRI had begun experiments in internal primaries, but Alemán cracked down on this democratic opening and had congress pass a law against parties from holding primaries.President of the PRI, revolutionary general had been in favor of primaries, but Alemán's viewpoint prevailed and PRI candidates were chosen in closed party assemblies.