These charts show just how far, and how quickly, the Democratic Party’s base has strayed from its working-class roots. In 2009, the average Democratic congressional district had a median household income, after adjusting for inflation, of about $67,000 — less than the roughly $70,000 median income in Republican districts. By 2023, though, the average Democratic district’s median income had risen to $81,000, while that of the average Republican district had fallen to $69,000.