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The comments seem to all think that efforts to enforce immigration laws — even just going forward are not worth the effort. The benefits from enforcement are many. One the current level of illegal and legal immigration is driving the population to 500 million by the end of the century- enforcement will check some of the environmental damage. Immigration (legal and illegal) has damaged labor markets for workers. Poor illegal are a net burden (services taken vs tax paid) on American tax payers.

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