Because Trump wanted to keep it in place until the issue of his wall came up. Right now he wants to build his wall, he needs money for it. Congress has to approve that money. He is holding us hostage, he wants the money for his wall in exchange for DACA or something like the Dream Act. Democrats have come out and said that they will not give him the wall in exchange for Dreamer's legalization. Trump now sees no value in keeping us afloat. He can kill us off now if he pleases. Trump never cared about us, he was never in favor of keeping DACA because we are "good people" He just wanted to use us.