Sen. Tom Carper, D-Delaware, joined Sens. Dianne Feinstein, D-California; Brian Schatz, D-Hawaii; Catherine Cortez Masto, D-Nevada; and Kamala Harris, D-California, in calling on the Donald Trump administration to reject a Justice Department request to include a question on citizenship on the 2020 Census.

“The inclusion of a question on citizenship threatens to undermine the accuracy of the census as a whole, and given this administration’s rhetoric and actions relating to immigrants and minority groups, the DOJ request is deeply troubling,” the senators wrote.

“Such a question would likely depress participation in the 2020 Census from immigrants who fear the government could use the information to target them. It could also decrease response rates from U.S. citizens who live in mixed-status households and who might fear putting immigrant family members at risk through providing information to the government,” the senators continued. “This chilling effect could lead to broad inaccuracies across the board, from how congressional districts are drawn to how government funds are distributed.”