I mostly agree with the Editorial Board of The Salt Lake Tribune reciting the 14th Amendment to the U.S. Constitution in their editorial: "Utah needs an accurate census count.” The pivotal word indeed is “persons.” I agree that the Constitution demands a count of the total number of humans to enable apportionment numbers to the U.S. Congress.
However, for many decades subgroups have been used. I have seen census data on my grandparents and others where it would cite “Head of Household,” “wife,” “child,” etc., etc. That subcategory data helped state and local municipalities judge demographic needs.