Then why does he want to change the law?
If you can get a lot of illegals to leave on their own with a promise that the “good ones” whatever that means can come its a good ploy. Once they are out the criteria for being a “good one” to come back can suddenly become prohibitive. All you have to do is require them to speak English. Most don’t. Or require them to have a fulltime job verified. Good luck to Pedro with that one. No welfare and most won’t even try to come back. There are many ways to skin a cat. Trump probably knows all of them.