Shut down freebies and stop employment for illegals. A large number will deport themselves when the jobs and handouts go away. That will significantly reduce the size of the problem.
Then deport those who seek emergency medical treatment (after they have been treated).
Then deport anyone who comes in contact with law enforcement for any reason.
That will cause another large self-exodus. Not many will want to live here when they can't generate income or get handouts and free (to them) services. It won't eliminate the problem but will bring it to managable size.
By the way, have you noticed that seven or eight years ago, back when George Bush was pushing Shamnesty, we were told by the federal government and the media that there were 12 million illegals here with about 1/2 to 1 million more entering each year.
Yet, over the last year or so we have still been told there are only 12 million illegals here.
Now some say the number is down to 11 million.
If we just wait long enough the federal government will report they are all gone and the problem will cease to exist.
/s
You know that if an illegal shows up at a hospital, ICE can’t just drive him to the airport and put him on a plane to oaxaca, right? Here’s the process - http://immigration.lawyers.com/deportation/Deportation-and-Removal-Process.html Multiply by 12 mil.