America has lost its power to China recently. Its thunder has been stolen by China in other words. This was the mistake of USA itself. It has raised China into manufacturing giant by providing them technology and money. Recently USA and China has decided to fly solo.
USA has lots of land, companies and less population. USA can re invite its companies to its home town and set up manufacturing plant in USA alone. But it requires lot of cheap man power which can be borrowed from countries like INDIA and AFRICAN continent. America can gain from GST for production and manufacturing and taxes from the employees from other countries. On top of that these employees need to live with the expenditure of house and utensils. Thus re using of money earned in their same country.