The solution is really, really simple. Just limit the number and degree of relatives any immigrant can bring to the States. Eliminate cousins, for example. Or aunts and uncles. And so on. If they really want to come, they can apply in the ordinary way.
Same issue. Dreamers stay, so do the parents, then grandparents, then cousins, then uncles, aunts, second cousins, etc. edit: = amnesty for 10's of millions.
That crowds out other immigrants based on who your family is, determining whether you're allowed to come to America.
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