By Jerry Pacheco / For the Journal   Andrés Manuel López Obrador In 1938, Mexico nationalized its energy sector, putting Petroleos Mexicanos (PEMEX) firmly under centralized government control where it remained for decades. During this time, PEMEX developed the reputation of a bloated bureaucracy, inefficient and incapable of keeping up with the nation's energy needs. Although Mexico is one of the largest oil producers in the world, it is forced to import most of its refined fuels. As a cornerstone of his administration, former Mexican President Enrique Peña Nieto (2012 to 2018) led the reform of Mexico's energy industry. This...