In July 1964, at a meeting of foreign ministers of the Organization of American States in Washington, the OAS resolved that its members should break diplomatic relations with Cuba. Mexico voted against. Bolivia, Chile and Uruguay also voted against, but they later complied.
Mexico kept its relations with Cuba. The historian Nora Pérez Rayón, in a study of the Mexican press in 1964, puts it plainly: “México fue el único país que ignoró la resolución” (Mexico was the only country that ignored the resolution).