Reddit reviews Melting Pot or Civil War?: A Son of Immigrants Makes the Case Against Open Borders

I think Reihan Salam has made a pretty good case that unless you are very confident in the upward mobility of low-skilled immigrant's children, it's probably best the U.S. pursue high-skilled immigrants more exclusively and the country back away from the status quo of heavily family-based policy. If you're interested there's a book he recently wrote on the topic, but I'd generally agree there's a reason most lasting low-skill immigration regimes are like the harshly enforced ones you can observe in Singapore and Qatar.