From the article.
This is the kind of response that will play well with Trump's base (and Sean Hannity):
We give you money to stem immigration and we don't see it working. Guess what? The trouble is, these kinds of feel-good solutions usually don't work. And Trump has proven over many years he is a master at knowing how to take a bad situation and make it a lot worse.
If it does make things worse, that will probably play well with his base, too. 1) It probably won't effect them in any way and 2) they like to see people suffer.