to Mueller's investigation to the White House; McGahn is the most cited witness in the Mueller Report. House Speaker Nancy Pelosi referenced the action as an obstruction of justice, stating during an event at Cornell University, "Trump is goading us to impeach him[.]" A week later, it was reported that Trump's lawyers believed that McGahn told Mueller he did not believe Trump obstructed the investigation and ordered him not to provide any documents he had to the Judiciary Committee. On May 21, 2019, McGahn defied a subpoena to testify before the House Judiciary Committee, at the direction of his former client. On August 7, the House filed a lawsuit with the United States District Court for the District of Columbia in an effort to challenge this precedent-setting move. Congressional subpoena On November 25, 2019, U.S. District Judge Ketanji Brown Jackson ruled that McGahn, who the Trump administration ordered not to cooperate with the investigation, must cooperate with the investigation and comply with a House of Representatives subpoena to testify. The Justice Department requested a stay pending an appeal of the ruling, but on December 2, Jackson rejected the request, calling the DOJ's assertion that the House Judiciary Committee would not be harmed by a stay "disingenuous." Jackson wrote, "DOJ's argument here that any further delay will not be harmful to the Judiciary Committee because, in essence, DOJ has already harmed the Committee's interests by successfully delaying its access to other materials strikes this Court as an unacceptable mischaracterization of the injury at issue." On February 28, 2020, a divided panel of the United States Court of Appeals for the District of Columbia Circuit reversed that judgment and ordered the House's lawsuit dismissed. Circuit Judge Thomas B. Griffith, joined by Circuit Judge Karen LeCraft Henderson, determined that the separation of powers under the United States Constitution does not allow Congress to use the Courts to force Executive officials to testify. Judge Henderson wrote a concurrence in which she argued the House simply did not have standing to sue in this instance. Judge Judith W. Rogers wrote a dissent. On appeal from the House, on March 13, 2020, the full Court agreed to reconsider the case. On August 7, the full Court ruled that the House of Representatives could sue to enforce the subpoena, but then, on August 31, the court ruled that the House had never been legally empowered by Congress