This is an Econ 101 hypothetical scenario. In the real world, there would be several years (or more) of massive economic dislocation. The bottom line is you wou

This is an Econ 101 hypothetical scenario. In the real world, there would be several years (or more) of massive economic dislocation. The bottom line is you would immediately be increasing the labor pool vastly in a certain number of trades/industries. You're also only focused on the US-- Mexico would suffer even more by having more of its most mobile, ambitious laborers flee the country.