The example of Arizona, where the departure of 40% of unauthorized migrants led to an annual reduction of 2% of GDP, provides clues as to what may happen at the national level if the Republican candidate delivers on his promise
Have you ever worked in agriculture? I have. Very few Americans are physically capable of doing farm work, except maybe part-time.
Meanwhile Americans have become so accustomed to heavily-subsidized food (subsidized through the government, unethical labor practices, and unsustainable land management) that we have no idea what the "actual" cost of food is. Many Americans would be literally unable (and most others would seriously struggle) to afford food grown on farms using environmentally sustainable methods and paying their employees a living wage. And I'm not convinced you could even find sufficient labor by offering a living wage: it is literally back-breaking work that exposes you to the elements, mostly occurs in the middle of butt-fuck nowhere, and is SUPER monotonous (in the case of monoculture farms, which most are).
In my experience Republicans with skin in the game who understand how the bread gets buttered aren't as xenophobic as the poor ones.
For example I work in construction and many projects would grind to a halt without illegal labor. Everyone implicitly understands this so we all agree to look the other way.
Illegals are willing to work harder jobs, work with more enthusiasm, and with lower pay. Costs of construction would skyrocket without them.
The most xenophobic ones are the ones that feel threatened by the presence of illegals. Ie low skill and low wage.
Everyone relax. Republican governors got this labor shortage figured out. Why do you think they’ve been rolling back child labor laws? Arkansas and Iowa are leading the nation on replacing adult labor with child labor and they can even pay them less and shield the companies that hire them from prosecution in the very very very rare chance one of these laborers dies from work related accidents!
You libs need to chill out and let the free market decide who get to keep their limbs or not!