At the same time as the Thursday hearing on voting system security that I’d mentioned, House Oversight will be holding a hearing on “Reaching Hard-to-Count Communities in the 2020 Census.” The witness list is still TBD, as far as I know.
[UPDATE: Here’s the witness list. And it’s a doozy. They’re not fooling around.]
While I’m at it, there’s a magnificent map of hard-to-count communities here, laying out the Census Bureau’s contact strategies in each location. The Census Bureau also has an interactive map for hard-to-count communities with a lot of demographic and socioeconomic information here; California’s complete count committee has distilled the info in California to show the top-three reasons why any particular census block makes it harder to count.