If you don't want flies, remove what attracts them, it's that simple. Because this ruling came down from the United States Federal Supreme court, this settles the whole issue for every other state in the Union.
This is a huge victory for America and will stop any other illegal person from entering the U.S. who is seeking a job. Finally something really concrete was done for our immigration problem. That court ruling is as good as any fence for stopping illegal jobs seekers but still does not stop the illegal drug problem and gangs that are now operating in all states in the union and does not stop terrorists from coming in.