So despite the positive birth rate and illegal immigration increases, Cook County is still bleeding residents, no doubt the wealthy ones who can afford to flee and take their wealth with them.
The wealthy leave but are small numbers. The working class leaving because there is no work in IL and there is work in NC, GA, TX, AZ.
Most leaving the rust belt are Democrats. They take their politics with them and are turning red states purple... even blue.
Rust Belt immigrants to red states are never asked to consider why there are jobs in red states, but not in IL or Democrat cities. Conservatives/Republicans have no concept of missionary work and conversion of others.
Heritage, CATO, AFP, etal make no attempt to reach beyond the choir to educate swing voters.