The United States is a vast country, with acres of potential, and at 330 million people, it is not heavily populated. Ok, some areas, especially the rich metropolitan cities, are crowded and busy places, but most other areas by comparison could even be said to be sparsely populated.
There are two problems in the U.S. economy, the vast number of houses lying foreclosed or disused, not generating income for the local muncipalities, and the rows of warehouses and superstores, also lying empty. The second problem is the high hourly wages which had become the norm, which makes American industries uncompetitive with the countries the U.S. has to import from, because of the differential in the hourly rate of pay.
Now consider a situation where the U.S. government encourages immigration, especially into the sparesely populated areas. Suppose rich immigrants, or at least people with the wherewithal to buy houses or open shops and factories, maybe one of those in the rows lying empty, and the possibility opens up that economic activity can be created, jobs will be created, manufacturing in the U.S. may become competitive, and wealth creation can once again fill a cohesive chain which for the past few years has suffered a dislocation.
Selective immigration would form part of the solution.
As President Clinton was saying on CNBC in the programme hosted by Maria Bartiromo,
"If African-Americans, Hispanics, and women are given an equal share of opportunities in the science and technical fields, then within six years the supply shortage in those fields would be gone."
This, coupled with selective immigration, would probably form the catalyst to the resurrgence of the American economy.