The problem is they cannot isolate the DACA/DREAMER legislation from an overall immigration reform. It makes no sense to do so and no sense that they believe they can do so.
Trump is applying political Ju-Jitsu on them. They will only get angrier and make more mistakes.
Pretty good political hardball from a supposed amatuer player.
Factor in ...Legals hate illegals..
Trump is, first and foremost, a businessman. So yeah, he knows how to be tough.
That’s one of the reasons I liked him from the beginning.