You seem to be confused here. We are discussing the incomes of typical voters for both parties. Historically the democratic party was the party of the working and middle class. Now they're becoming the party of the very rich and very poor. They abandoned the middle and working class and left them for the republicans, who used to be the party of the rich.

>Some recent US figures on the distribution of income by party: 65 percent of taxpayer households that earn more than $500,000 per year are now in Democratic districts; 74 percent of the households in Republican districts earn less than $100,00 per year. Add to this what we knew already, namely that the 10 richest congressional districts in the country all have Democratic representatives in Congress.

https://www.thenation.com/article/society/democrats-rich-party-obama/

For some reason these facts are making people very angry. We went from Occupy Wall street to letting them try to pretend that skin color and not class are what divides us. Coincidentally this leaves the 1% off the hook. While we fight over skin color, we let them get away with the largest wealth transfer in history from the poor to the rich during the lockdowns.