::When the President nominates someone to any federal office, the formal nomination papers sent to the Senate are in the form "I nominate [name] of the State of state to be office. The state named would be that of the candidate's residence (so it is perfectly plausible that Maryland would be listed even if the candidate worked in D.C.). Traditionally, lists of Justices (including the one on the Supreme Court's own website) use the location designated in the nomination paper.