https://www.debt.org/faqs/americans-in-debt/economic-demographics-democrats/
An individual’s likelihood of being a Democrat decreases with every additional dollar he or she earns. Democrats have a huge advantage (63 percent) with voters earning less than $15,000 per year. This advantage carries forward for individuals earning up to $50,000 per year, and then turns in the Republicans’ favor — with just 36 percent of individuals earning more than $200,000 per year supporting Democrats.
Interestingly, the median household income in the United States is $49,777 — right near the point where the Democratic advantage disappears and the Republicans take over.
About half of Democrats express satisfaction with their personal financial situation, compared with 61 percent of Republicans and 52 percent of Independents.