It takes a couple of generations for immigrants to catch up in their ability to be productive, assuming that they are able to catch up.
Europe found out the hard way that many of their immigrations could not reach high school in their academic abilities.
There is a quote that I can paraphrase, but the original is better. It says that they use immigration to tamp down on wage increases for the poor.
The US has been quite lucky in the quality of its recent immigrants, vis a vis Europe. They are harder working, not Muslim (or relatively few are), and are educable to high school, whatever their failings beyond that.
Germany probably would swap their million 2015 refugees for some of Bidens 6 million in a minute.
That is inadequate consolation, but its true.
The migrants are a “voting bloc”.......they arrive here neat,
clean, well-fed, hydrated, with money in their pockets.
They are on foreign soil yet seem to know their way around.
They know, and obediently follow the pre-planned directions.
That doesnt happen in a vacuum.
Reality Check.
They are being subsidized by their homelands to advance
the anti-American political agendas of Third World despots.