Like the near countless waivers & delays that he instituted in the ACA that he trumpeted for? It is not for him to decide what is constitutional or unconstitutional, that is for SCOTUS which they have done throughout the U.S. of A,'s history. The Attorney General can file for SCOTUS to hear such a petition. Until then, written law is law.<quoted text>The POTUS has a duty NOT to enforce unconstitutional laws.
IF he wants a law created, changed or deleted it is to be done so ONLY thru the Legislative branch. Not his own whim.