If you’re looking for some data to play with, FiveThirtyEight just made it easier to download their data and code. They’ve been on GitHub, I think from the beginning, but this data page is even more straightforward and to the point.
FiveThirtyEight datasets available for download
Projects by Nathan Yau See All →
What Qualifies as Middle-Income in Each State
The meaning of “middle-income” changes a lot depending on where you live and your household size.