This is interesting. It would seem to imply that among whites, democrats are much richer than republicans without their own religion
I don't think that's surprising at all given the geographic and education distributions of white Democrats vs. white Republicans. The Democrats are the party of wealthy, highly educated white people, as well as minorities, who are disproportionately poorer and less educated (although wealthy/more educated minority voters are also Democratic), while the Republicans are the party of middle-to-low income, middle-to-low education white people.
I find it interesting that
nonwhite R evangelicals are slightly less likely to have children under 18 in their household than their D counterparts, which is the opposite of what we see with nonwhite Catholics. Their median household income is similar to that of nonwhite D Catholics at a similar age.
Nonwhite evangelical Protestants have a larger D-R household income gap, but nonwhite Catholics have a larger D-R "living with children under 18" gap.