The American Civil Liberties Union is going after the Trump administration for allegedly lying about the reason it wants to add a citizenship question to next year’s U.S. census, reports the Washington Post.

The ACLU “filed a motion in district court Thursday morning for ‘sanctions and any other relief the court deems appropriate, because of apparently untruthful testimony’ by Trump administration officials in the earlier trials,” attorney Dale Ho told the Post. Ho represented the ACLU in oral arguments before the Supreme Court.

Documents found in the effects of GOP gerrymandering expert Thomas Hofeller, who died last summer, show that even before the 2016 election, Hofeller advocated adding the citizenship question to the census to benefit conservative “non-Hispanic whites.”

Donald Trump’s election allowed the right-wing plans for a citizenship question “to become a reality,” the Post says.

Trump officials had claimed the citizenship question was aimed at improving enforcement of the Voting Rights Act.

Three federal judges have ruled against allowing the question, which has never been asked in a U.S. census before. The case is now in the hands of the Supreme Court, which is expected to decide by the end of June.

But it remains to be seen if the newly disclosed Hofeller information can be added to the evidence and testimony the Supreme Court is considering.

“We started at the district court because that where the misrepresentations were made,” Ho said. “We’re evaluating what other options would be appropriate.”

Ho said the new Hofeller information — first reported by the New York Times — “shows that there was a long-standing plan to weaponize the census to dilute minority voting power to try to forestall the electoral effects of the demographic changes that this country is undergoing.”

Sanctions “could include fines imposed on witnesses or the government, a reopening of the case or an amendment of the final judgment to account for new evidence,” Ho told the Post.

“The ACLU also asked the [district] court to allow previously redacted testimony … to be made public.” The judge “ordered that the government must provide a response by 10 a.m. Friday and called a hearing on the matter for Wednesday,” says the Post.