 In June 2019, Gillibrand was one of twenty-eight senators to sign a letter led by Brian Schatz to United States Secretary of Commerce Wilbur Ross warning that Ross would "further delay and jeopardize the Census Bureau’s ability to conduct a full, fair, and accurate decennial census as required by the U.S. Constitution and the Census Act" by continuing to attempt adding the citizenship question to 2020 census materials.The senators urged Ross to "allow the Census Bureau to proceed with preparation for a 2020 census without a citizenship question on the questionnaire.