The Trump administration formally denied in a new filing that a longtime Republican redistricting specialist was involved in formulating a question about citizenship for the 2020 U.S. Census, as the U.S. Supreme Court mulls whether to allow that option on the national survey next year.

Attorneys from the U.S. Department of Justice wrote in the new filing that new claims from those suing over the citizenship question were “more like the product of a conspiracy theorist than a careful legal analysis.”