The funny part is, his numbers don't say what he wants them to say, so he has to pick very carefully to make the point. The US has a current labor shortage with gigantic immigration: we're growing very quickly. He picks an ideal that takes in the Great Depression as an economic golden age. Someone should really give him a history book. It should include the know nothings and other Nativist problems. Finally, a short course in economics would be helpful, along with a brief perspective on immigration.
Not that I expect him to do that. I believe "know nothing" was an appropriate name for anti-immigration sentiment then and now.