How much do you know about the economics of manufacturing, Longtimefan?
Transportation expense and proximity to customers are huge factors for many items that will never be sent overseas. Increased use of robots takes the lower cost labor out of the equation almost entirely.
Sneakers and t-shirts, sure. Electrical equipment (switches, panels, etc), HVAC equipment and other lower volume, higher value stuff is not leaving the US ... unless the EPA, OSHA and other Government agencies force more into Mexico.
As long as there are high tax states that toddy up to Unions like New York, the Southern states will do fine.
It was --- and continues to be --- politicians that killed business in the North and who have tried to shift the blame to "greedy" businesses.
To hear these politicians now bemoan the fact that the industries either left or died is nauseating. Or to have them suggest they are going to somehow revitalize manufacturing is mind-boggling. North Carolina didn't kill Detroit. Detroit and the UAW killed Detroit.