SCOTUS grants cert to decide the scope of discovery in case challenging 2020 census question about citizenship status

Today the Supreme Court granted certiorari in In Re Department of Commerce and ordered an expedited briefing schedule. Here is the text of today’s order:

The petition for a writ of mandamus is treated as a petition for a writ of certiorari. The petition for certiorari is granted. Petitioners' brief on the merits is to be filed on or before Monday, December 17, 2018. Respondents' brief on the merits is to be filed on or before Thursday, January 17, 2019. The reply brief is to be filed on or before Monday, February 4, 2019. The case is set for oral argument on Tuesday, February 19, 2019.

The question presented is:

Whether, in an action seeking to set aside agency action under the Administrative Procedure Act, 5 U.S.C. 701 et seq., a district court may order discovery outside the administrative record to probe the mental processes of the agency decisionmaker—including by compelling the testimony of high-ranking Executive Branch officials—when there is no evidence that the decisionmaker disbelieved the objective reasons in the administrative record, irreversibly prejudged the issue, or acted on a legally forbidden basis.

You can find all the briefing—and follow the merits briefs as they come in—at SCOTUSblog and at the Supreme Court website.