The Rats will never go for it.
I think the Rats will make any deal at all to legalize the DACA "kids".
First off, because once they're legal there's no give backs. Any concessions their side makes can be taken back (and when I say can I mean will, obviously).
Also, it sets precedent. If it's not their fault their here illegally, then the same argument should be applicable to the next generation who are brought here, etc, etc.