“The department’s letter explained that accurate citizenship data is crucial to the department’s enforcement of Section Two of the Voting Rights Act, and it’s important protections against racial discrimination and voting,” Gore explained. “To fully enforce those requirements the department needs reliable citizen voting ago population data in localities and census blocks, where voting rights violations are alleged or suspected.”
https://www.oann.com/supreme-court-will-take-up-case-of-citizenship-question-on-2020-census/