Every president since Ronald Reagan, including Donald Trump, has followed DACA for humanitarian reasons. Barak Obama, either out of an act of courage or foolishness, reduced it to writing and that writing was challenged in the courts and the courts said, "Congress writes the law, you don't. You can't change the law congress has written even though all your predecessors going back to Reagan have done so."
Judge Andrew Napolitano
The granting of a pardon is an imputation of guilt, and the acceptance a confession of it.