The trade deficit and globalization have more to do with this than demographics.
"The United States has been running consistent trade deficits since 1980 due to high imports of oil and consumer products. In recent years, the biggest trade deficits were recorded with China, Japan, Germany, Mexico and Saudi Arabia. United States records trade surpluses with Hong Kong, Australia, Netherlands and Belgium."
"The United States has been running consistent trade deficits since 1980 due to high imports of oil and consumer products. In recent years, the biggest trade deficits were recorded with China, Japan, Germany, Mexico and Saudi Arabia. United States records trade surpluses with Hong Kong, Australia, Netherlands and Belgium."
http://www.tradingeconomics.com/united-states/balance-of-tra...
http://economyincrisis.org/content/failed-trade-policies-hav...