Our limited resources should be focused on effectively monitoring our immigrant population, not on monitoring our U.S. cities. Financial provisions would have to be made for the staffing of such a program. Perhaps the expectation is for the costs to be offset by the recapture of federal funds when infractions are identified. Currently we cannot properly manage our immigrants, much less impose and obtain hefty fines from them. They are not a source of income for our government - but our cities are. One possible conclusion: Monitoring sanctuary cities is more lucrative to our government than monitoring immigrants, making some persons richer but none of us safer.