Elixir
Made in America
The U.S. doesn't have a middle-class, individual states, cities, communities have a middle class. The most cogent definition is likely something along the lines of the middle third of the income spectrum in the community you live in.
I assume you mean the middle third of the people on that spectrum, not the middle third of the income spectrum itself - which, in many US communities is barely occupied. Such is the state of wealth disparity in the US.
The income spectrum would be a scatter-plot of incomes in a community, so the middle third of people, and the middle third of the spectrum is the same thing. I can see how one would want to politicize the definition, but the only real way to define middle class is this way. Plot incomes, and take the middle third. If many people lean to the left that means there is a large lower class and a small middle class.
I see it differently.
If you have 100 people making between 10,000 and 1,000,000 dollars a year, the middle of the spectrum is 500k. But if only 5 people are making $1,000,000, 25 people are making 100,000 and 70 of them are making 10,000, the middle third of the people are making 10,000. A long way from the middle of the “income spectrum”.
And that’s basically what’s going on with the US economy.
In fact, the top of the US income spectrum was $140,000,000,000.00 last year (Elon Musk). Presumably the bottom was zero. The middle third of the spectrum ($46.66... billion to about $93 billion) probably contains literally nobody except Bezos.