United States district court
(j) The term “judicial proceedings instituted by the United States” as used in this section refers to all proceedings, whether criminal or civil, including pretrial and grand jury proceedings (as well as proceedings upon a petition for a writ of habeas corpus initiated in the name of the United States by a relator) conducted in, or pursuant to the lawful authority and jurisdiction of a United States district court. The term “United States district court” as used in this subsection includes any court which is created by an Act of Congress in a territory and is invested with any jurisdiction of a district court established by chapter 5 of this title .