Its probably possible to gerrymander a state without this information? Sure, it would be harder (and probably less effective) but you could use proxy metrics to

Its probably possible to gerrymander a state without this information? Sure, it would be harder (and probably less effective) but you could use proxy metrics to figure out the distribution of race within a state. I imagine I could use housing data as a proxy for example, given that property values are correlated with race. I don't have exact proof of that last statement, but it feels right. Also, I did some reading. Apparently the census has been asking these questions since 1790 https://www.census.gov/acs/www/about/why-we-ask-each-question/race/ https://www.census.gov/acs/www/about/why-we-ask-each-questio.... Though, I imagine the nature of the question has changed over time.