Immigrant rights groups challenging the Commerce Department’s decision to add a citizenship question to the census asked the Supreme Court to consider postponing a ruling on whether the Trump administration can do so.

In a filing with the high court Wednesday, lawyers for the American Civil Liberties Union, which is representing the organizations, said that if the justices do not intend to uphold lower court rulings against the Trump administration, they should send the case back to the federal district court in light of newly uncovered evidence that cast doubt on the Commerce Department’s motivation for including the citizenship question on the 2020 census.