The US is a big country and has room for lots more people. Cant the USA sustain unlimited immigration?
The USA is no longer a big country. Its water resources are stressed, gridlocked cities, severe air pollution, species extinction, global warming from massive use of fossil fuels and overpopulated. If the current rate of immigration continues, the US will double its population to over 600 million by 2065. Our quality of life and standard of living will degrade to that of the Third World.