If you remember the Clintons and Al Gore telling us how good NAFTA was going to be for us, bobby, NAFTA had a lot to do with the maquiladoras going up.
Businesses put assembly and shipping plants just inside the Mexican border, paying Mexican wages and not U.S.
But then after obama got elected and the economy started going down the Clintons and Al Gore started twlling us how bad NAFTA was for us.

From Wikipedia:

maquiladora (Spanish pronunciation: [makilaˈðoɾa]) or maquila (IPA: [maˈkila])[1] is the Mexican name for manufacturing operations in a free trade zone (FTZ), where factories import material and equipment on a duty-free and tariff-free basis for assembly, processing, or manufacturing and then export the assembled, processed and/or manufactured products, sometimes back to the raw materials' country of origin.

Currently about 1.3 million Mexicans are employed in one or more of approximately 3,000 maquiladoras.[2]

The term maquiladora, in the Spanish language, refers to the practice of millers charging a maquila, or "miller's portion" for processing other people's grain.[3]

They moved from Mexico to 3rd world countries overseas now because their labor costs were rising in Mexico.
They used their tax incentives to do it too.
NO Romney-Ryan administration Will Ever change that for Their Corporate Owners either.
Higher tariffs Must be put on all imports from 3rd world nations making it unprofitable for the Hate America Profit Driven Only Corporations to continue the manufacturing of products off shore at the expense of American jobs leaving not much left in America by way of employment where what they bring back will continue selling anyway.
America cannot and WILL NOT survive as solely a service Economy.
Once Corporate America realizes their long term goal of turning America into another 3rd world Nation just like those they already enslave where they pay slave wages with no benefits they then will bring those jobs back to pay slave wages here with no benefits.