"They will not be subject to any kind of deportation," Mattis told reporters as quoted by the Associated Press. "In terms of the DACA situation ... it's clarified they are not in any kind of jeopardy."
That also applies to any honorably discharged veterans, he said.
However, Mattis said the protection doesn't include someone who commits a serious felony or who has been has ordered deported by a federal judge.This applies to about .01% of actual DACA or DREAM Act individuals. And those individuals have worked their ass off in service to this country. They haven't been sitting on their ass asking for hand-outs.
In short, those are the kind of people we WANT to have in this country. You do a hitch in the military, you should earn the right to stay here if you want to do so.