Does the income-politics relationship remain if you look only within ethnic/racial groups? Overall, poor people are more Democratic than rich people, but the ra

Does the income-politics relationship remain if you look only within ethnic/racial groups? Overall, poor people are more Democratic than rich people, but the racial makeups of those income groups are also considerably different: people making over $100k are much more likely to be white than people making under $20k are. It's possible the answer is still yes, but it'd be interesting to see a breakdown.