En lo oscurito, “in the little dark,” means done out of sight. In April 2019, after money and assets were returned to the union leader Elba Esther Gordillo, President López Obrador said “No hago acuerdos en lo oscurito” (I do not make deals in the dark). La Razón reported that Morena’s national leader, Mario Delgado, said his party makes no deals en lo oscurito with the PRI.
The Excélsior columnist Jorge Fernández Menéndez has written that, in Mexico, a legislative agreement is assumed to have been made in the dark.