Econ 101: wages are marginal product (google it if you don't know what that means)

- The evidence is that the decline in manufacturing is mostly about increases in productivity - basically automation. It has nothing to do with regulation and taxes.

- The marginal product of any job that hasn't been automated away is too low to pay a middle class wage in the US.

Firms will not re-shore manufacturing. They'll invent robots to do it, or they will close as being unprofitable.