Comstat, for example, was devised by the Big Apple's former police chief, William Bratton, and his colleague, Jack Maple (who has been an adviser to New Orleans).
If I were president of the United States, I could do something about that by deploying a fence, by deploying a virtual fence, by having a BorderStat system like my COMSTAT system that brought down crime in New York, and just stopping people from coming in, and then having a tamper-proof ID card.