It's the hurricane of illegals.
Not an Act of God, but an act of governments. Mexico is funneling these people through, and the administration doesn't really mind.
I care more about the status of people who attempt to immigrate legally. It can take many years, even if you are a nurse, an MD, or a Physics PhD, and even then it might not be OKed.
Don't we have enough unemployed Americans? Or have we given up on them by giving them food stamps, welfare, and disability? When you quit having citizenship expectations of people, they often quit having those expectations of themselves. A sad fact of human nature, especially for the weak-willed or the rent-seeking.