Comment: Indeed

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Indeed

Restricted immigration has always been about protecting unionized labor (in a parallel to how tariffs are about protecting cartelized industry). That and electoral politics (keeping out a demographic which is likely to vote for your opponents). Since the Republicans don't get the support of the unions, I assume their opposition to immigration these days is political: trying to keep out Hispanics who tend to vote Democrat. It was the same in the 19th century: The Reps tried to keep out Irish, Italians, and Germans who tended to vote Democrat.

The libertarian position is for free immigration right along with free trade.

"Alas! I believe in the virtue of birds. And it only takes a feather for me to die laughing."