Yes I understand that .... but she could do so by an executive order.
I think a lot of people have a flawed understanding of exactly what an executive order is, and what you can do with one. Suffice it to say that an executive order that purports to grant amnesty to all those illegals would be shot down in a heartbeat by the courts.
Or to put it differently, if they thought they could do it simply via executive order, they would have done it many years ago.