Midwest

The shrinking working-age population

Note: Economic Innovation Group; Chart: Axios Visuals

About 80% of U.S. counties lost prime working-age adults between 2007 and 2017, and 65% will lose more over the next decade.

Why it matters: While population decline is affecting parts of every state, the loss of the working-age population is being felt most acutely in places that are already struggling economically, according to an analysis by the Economic Innovation Group and Moody's Analytics.

The new cities to watch

Data: McKinsey Global Institute; Map: Andrew Witherspoon/Axios

The triumph of rich cities may hog the demographic headlines, but midsize cities' turnaround struggles under the shadow of automation will shape the urban future in the U.S., according to the author of a new McKinsey Global Institute report.

Why it matters: While 2 dozen high-performing cities are poised to pull further ahead of the rest of America, the cities to watch are those in between the mega-cities and the low-growth rural areas — the places McKinsey calls "niche cities" and the "mixed middle," according to report author Susan Lund.