"To remove the coca leaf - the leaf, not cocaine - from the prohibited substances list." Mexico president takes aim at predecessor after U.S. court convicts drug czar MEXICO CITY - Mexican President Andres Manuel Lopez Obrador on Wednesday said one of his predecessors, Felipe Calderon, should explain whether he knew a former top law enforcement official took bribes from the infamous Sinaloa Cartel. On Tuesday, a U.S. court convicted a former security official, Genaro Garcia Luna, on charges that he took bribes in exchange for protection from arrest, safe passage for drug shipments ...