You can massage the data to tell any story you want.
To your point about city mayoralties, on average, Republican-led metros have lower inequality and higher cost-of-living-adjusted incomes than Democrat-led metros[1][2].
There isn't really a strong correlation between successful government and the predominant governing party. What you'll find is that things are not so simple that you can pin all of our problems on a single party in a neatly packaged way.
> To your point about city mayoralties, on average, Republican-led metros have lower inequality and higher cost-of-living-adjusted incomes than Democrat-led metros[1][2].
Isn't it just that they are smaller and less successful?
There doesn't appear to be a size/population correlation.
> less successful?
That depends on what your criteria for "success" is. San Francisco has among the highest per capita GDP of any city in the Union as well as a thriving technology economy, but also has the highest rate of homelessness, as well as the highest percentage of people living below the poverty line. What does "success" mean?
It seems a little weak, for instance, to call out the success of Provo, which is indeed Republican-led, but is part of the Democratic-led SLC combined statistical area. Yes: lots of suburbs and exurbs are Republican-led! They're also drafting off the larger economies of other urban areas.
I'm not sure that it's fair to say that Provo is drafting off of the Salt Lake economy. It's not just a bedroom community for Salt Lake; it's got its own universities (plural), hospitals, and tech scene. About the only thing it doesn't have is an airport.
It's as far from SLC as Elgin is from Chicago. Claremont has a bunch of different colleges; it's still part of LA metro. The point is that Provo wouldn't have the economic advantages it's taking advantage of without the economy of SLC in close proximity.
All true. And yet, Provo is far more independent than your examples, both geographically and socially/economically.
How big is Claremont? How big is the LA metro area? How big is Elgin compared to Chicago? Provo is maybe half as big as Salt Lake.
When you're in Claremont, and you want a night out, do you stay in Claremont? Do you in Elgin? In Provo, you're more likely to stay local than go up to Salt Lake. As I said, it's geographically more distinct, but there's also a more insular mindset. "Claremont" is a legal entity, and it's a collection of colleges, but it's not much of an entity in peoples' minds. It's just part of the LA metro area, sharing LA's smog. Provo, in contrast, has a separate identity from Salt Lake, and even has separate smog.
All right, let me put it this way. Provo isn't just a suburb of Salt Lake. Provo has its own suburbs (most of Utah County). Claremont doesn't. (I don't know about Elgin.)
Colorado Springs does. It has a much more independent existence. It's across the Palmer Divide from Denver. It probably depends on the Air Force at least as much as it depends on Denver. In the same way, Provo probably depends on BYU as much as it depends on Salt Lake. (Whereas Elgin and Claremont are much more tied in to Chicago and LA, respectively.)
How many residents of Elgin work in Elgin? I suspect the fraction is much higher in Provo (and Colorado Springs).
To your point about city mayoralties, on average, Republican-led metros have lower inequality and higher cost-of-living-adjusted incomes than Democrat-led metros[1][2].
There isn't really a strong correlation between successful government and the predominant governing party. What you'll find is that things are not so simple that you can pin all of our problems on a single party in a neatly packaged way.
[1] https://www.theatlantic.com/business/archive/2014/10/why-are...
[2] https://www.nytimes.com/2019/11/13/upshot/red-blue-diverging...