Ask any doctor or nurse who works in a hospital in a border state. It is common practice for Mexican immigrants to bring their sick relatives across the border and dump them in American hospitals, from which, by current law, they cannot be removed.
If these patients are chronically ill, they cannot be discharged, ever, and each of them costs the hospital millions.
Not just border states either!
They are also bringing contagious diseases to the U. S. that we thought were under control years ago.