U.S. District Judge Ketanji Brown Jackson didn’t hold back in her ruling that former White House counsel Donald McGahn must comply with a House Judiciary Committee subpoena for his testimony as part of the impeachment probe.

The 120-page opinion drew on a variety of sources, such as a past court opinion determining that former White House counsel Harriet Miers similarly had to comply with a congressional subpoena. It also included a significant number of citations from “The Federalist Papers,” and even a reference to George Orwell’s “Animal Farm.”