A progressive public interest group filed a lawsuit Monday to force the disclosure of documents related to the decision to include a citizenship question on the 2020 census.

Restore Public Trust accused Commerce Secretary Wilbur Ross of misleading Congress about the decision to include the citizenship question in the upcoming census.

{mosads}”The American people have a right to know what Secretary Ross and the rest of Trump’s political appointees discussed behind closed doors as they devised a scheme to make the census less representative for all Americans,” Kyle Herrig, senior adviser to Restore Public Trust, said in a statement.

“Even more disturbing than Secretary Ross’s attempts to avoid public scrutiny is his apparent lies to Congress and evasion of Congressional oversight.”

The Department of Commerce did not immediately reply to a request for comment from The Hill.

The agency announced the addition of the citizenship question last year, a move which prompted fierce opposition from Democrats and attracted several legal challenges.

Opponents argue that asking about citizenship will cause noncitizens and other immigrants to skip the question or the census altogether, leading to inaccurate counts.

The Trump administration has argued that it needs to collect the data in order to help the Justice Department enforce the Voting Rights Act.

The legality of the addition of the question is now being considered by the Supreme Court.