You can check out plenty of other nations, particularly the ones that up to now have provided immigrants to America. They are all getting to be in the same shape or are already there. Population collapse is now the issue, not "exponential growth." As more Americans emigrate to escape fascism, and immigrants discover life in America is no better or worse than what they left behind, America will tip faster than the experts have all been predicting into a depopulationary spiral.
I am genuinely confused as to why a reduction of our population is a bad thing, don't you think 325+ million is about 125 million too many ?
IMHO, it seems the "sweet spot" is around 200 million., that is roughly when we had peak prosperity and affordability of housing, etc.
I am not a demographics guru, so you very well can be right, what do you think is incorrect about my position ?