The purpose of this article is to present the general conception of the Plan Alliance for Prosperity of the Northern Triangle, one of several programs promoted by President Barack Obama to stop the migration of children and adolescents from Central America traveling unaccompanied by their family members, on the framework of a regional security global strategy, which includes the southern border of Mexico as a territory for the transit of migrants and drugs. The article also analyzes the changes in immigration matters that occurs with the arrival of President Donald Trump administration, whichemphasis the security and militarization of borders.