The author focuses on physical presence in a country, but as she points out, immigrants flocked to the US because it's an economic powerhouse. This will not cha

The author focuses on physical presence in a country, but as she points out, immigrants flocked to the US because it's an economic powerhouse. This will not change, and for all intents and purposes the talent will still be in the US, since their work will be in the US. If anything, it will make it even stronger, since most of the interesting things in e.g. tech are done there, and there is now less of a barrier to get the talent. Big fish will eat the small fish, you can see this clearly in e.g. the EU, where "talent" from smaller poorer countries goes to richer countries massively, since there are effectively no borders or barriers. So they might not be there physically, but this is not really a big concern if you're a US company. It might be different for the country as a whole though.