Two House Democrats are pushing back against the Department of Justice adding a citizenship question to the 2020 Census.

Reps. Jose Serrano and Grace Meng, both of New York, sent a letter to Commerce Secretary Wilbur Ross on Thursday asking him to reject a proposal to add a question about citizenship to the census, saying it “will negatively affect response rates, jeopardize the accuracy of the collected surveys, and deter many people from participating.”