So DC, being a federal territory, historically was governed by leaders picked directly by the President. In 1973, Congress passed a law providing for a popularly elected Mayor and a board of District Councilmembers.

DC governance is in those parts that “went missing” from Congress’ version of the Constitution.

To exercise exclusive Legislation in all Cases whatsoever, over such District (not exceeding ten Miles square) as may, by Cession of particular States, and the Acceptance of Congress, become the Seat of Government of the United States