I don't think so, there's still an endless amount of people who are willing to move to the US or desperately want to, not even considering the huge amount of refugees we could take in.
I mean this country is definitely the biggest developed shit-hole on earth and would be the last place I'd ever migrate to, don't get me wrong. But we have pretty much a monopoly on the world economy and that will always bring tons and tons of people here if we allow it.
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Spawn of questionable parentage!
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