There are so many complexities to this debate. For example, if you oppose foreigners coming to America, do you also oppose America exporting stuff to these fore

There are so many complexities to this debate. For example, if you oppose foreigners coming to America, do you also oppose America exporting stuff to these foreigners wherever they currently are? Presumably no. If not, how are they able to afford your exports, which in turn keep you, an American, in your job? Their ability to create value, and trade this value for somebody else's value. What if, then, their ability to produce this value is magnified by their coming to America? You know, like that example given by a commentor, of a fashion designer from Oklahoma moving to Paris or Milan? Or my friend from Thika, Kenya? He has done design work for Daimler Trucks, but was denied a visa by the American embassy in Nairobi, having been seconded to the American branch of Daimler's trucks business by their German business. The embassy simply didn't see how this Kenyan kid landed this gig, despite all the supporting documentation and opportunity to verify, so they alluded his paperwork was fake and denied him the visa. Would he have made more money over there? You bet. At any rate I bet. Would he be able to buy more American stuff, keep more Americans in their jobs? Yes. But now he can't, coz your govt won't let him come over. Who is the loser here? Remember, the reason he caught Daimler's attention in the first place, despite his lack of formal design training, was his work. In fact, they wanted him to come to America to formally study design at Daimler's cost, since that formal education was part of Daimler's hiring policy. So it wasn't merely that he'd have taken an American job, or that Daimler can train plenty of the available Americans. He was a "great programmer", and I'd say America is worse off for not hiring him.