they shall have such qualifications as by law required, shall serve four years and shall not be removed except by impeachment proceedings or for incapacity to discharge their duties, in accordance with the law.
The Supreme Court of Justice may remove the District Judges from one District to another, or it may fix their seats in another locality, as it may deem most advantageous to the public business. A similar procedure shall be observed in the case of Circuit Judges.
The Supreme Court of Justice may likewise appoint auxiliary Circuit and District Judges to assist in the labors of such courts as have an excessive amount of business, in order that the administration of justice may be speedy; it shall also name one or more of its members or some district or circuit judge or shall designate one or more special commissioners, whenever it shall deem it advisable or on the request of the President or of either House or of any State Governor, solely for the purpose of inquiring into the behavior of any judge or federal justice or into any fact or facts which amount to a violation of any individual rights or to the subversion of the popular will or any other offense punishable by Federal statute.
The Circuit and District Courts shall be assigned among the several Justices of the Supreme Court who shall visit them periodically,
