Exactly.
I do think we can keep most of new illegals out, but saying we can just ship away all the ones we have is gounded in fantasy.
Why can't anyone see a way of getting rid of them other than putting them on buses? Remove their reason to come here, and they'll even pay for the buses themselves. No welfare (including tuition breaks and that sort of thing), no medical care beyond emergency stabilization and severe, punishing, business-threatening fines for employers caught hiring illegals.