Yes. Read up on it.
I still see millions of them living and working here.
Your powers of logic and rational thinking are simply underwhelming.
Left unanswered was why, if the high birth rate was so healthy economically for Mexico - they had to export so many of them, and remain mired in poverty?
Everyone already knows the answer to that, and it has nothing to do with population and everything to do with fleeing a corrupt government.
Or did you not know about Mexico's dalliances with communism and the drug trade crime and corruption?
And yet you cannot seem to mention a single example of a nation with good governance, a high birth rate, and economic success!
A decline in the rate of how many illegal immigrants come into the USA is hardly the “collapse” of illegal immigration in these United States. There are still upwards of ten million of them living and working and reproducing here.
Communism? Really? The wealthiest man in the world is a Mexican who owns Telamundo and you think their economic problem is that they are Communists?
Delusional. They couldn't even qualify as a political party in Mexico because they had so few members!