This bill, known as the "Ensuring Full Participation in the Census Act of 2026," proposes to amend Title 13 of the United States Code. Its primary objective is to prohibit the inclusion of any questions concerning citizenship, nationality, or immigration status in questionnaires or surveys used for the decennial census of population. This restriction would apply to inquiries about the respondent, their family members, or any individual residing in their household. However, the legislation includes a specific exemption for the American Community Survey (ACS), allowing it to continue asking such questions. The bill aims to promote broader participation in the decennial census by removing these particular inquiries from its scope.