The exit poll data do break it down by income and by race, but separately. So they just have "low income" vs "high income". And "white" vs "black".
I am looking for data that break it down by both income and race. So something like "low-income whites", "low-income blacks", "high-income whites", "high-income blacks".
Where can I find such data?
I am particularly interested in the 2016 Presidential Election, but I'm also looking for data for previous elections.