A federal judge in New York has ordered the Trump administration to provide documents related to its decision to include a citizenship question on the upcoming 2020 census, and said the lawsuit challenging that question filed by 17 states and the District of Columbia can move forward, New York Attorney General Barbara Underwood said.

“The federal government has a solemn obligation to ensure a fair and accurate count of all people in this country,” Underwood said in a statement. “By demanding the citizenship status of each resident, the Trump administration is breaking with decades of policy and potentially causing a major undercount that would threaten billions in federal funds and New York’s fair representation in Congress.”