@DrChris
It wasn't even an Executive Order
On June 15, 2012, then-Secretary of Homeland Security Janet Napolitano issued a memorandum entitled “Exercising Prosecutorial Discretion with Respect to Individuals Who Came to the United States as Children,” creating a non-congressionally authorized administrative program that permitted certain individuals who came to the United States as juveniles...to request consideration of deferred action for a period of two years,
https://www.dhs.gov/topic/deferred-action-childhood-arrivals-daca