Why is it a binary choice? Why not admit that immigration laws (1) have been discriminatorily weighted towards Western Europeans for centuries; (2) unrealistic re: the need for seasonal agricultural and hospitality employment since the end of the bracero program by JFK to appease unions; and (3) ignores the whole issue of employers' need for workers willing to work at low-paying jobs? And realistically factor in the humanitarian issues of those trying to escape poverty in totalitarian regimes that condemn people to lifetimes of poverty and persecution; fixing the asylum immigration courts for short, realistic decision making rather than years-long, drawn out, bureaucratic systems? Do that, then managing the southern border becomes as manageable as managing the northern border, and the air and sea ports.