The problem is not just political. Young families are leaving large urban metros so quickly that several counties—including those encompassing Manhattan, Brooklyn, Chicago, Los Angeles, and San Francisco—are on pace to lose 50 percent of their under-five childhood population in the next twenty years.28 Democrats cannot simultaneously claim to be the party of middle-class families while presiding over the parts of the country that they are leaving.
The datasource shows declines everywhere and families have always left cities. Their source updated 2025 to show it stopped.
