2. A locally-elected mayor and thirteen member council govern Washington D.C., but Congress has supreme authority and may overturn local laws. Residents elect a non-voting delegate to the House of Representatives, but have no representative in the Senate. The 23rd Amendment to the Constitution gave the District three electoral votes.
4. By law, the skyline is low and sprawling--no building may be taller than the width of the adjacent street (plus 20 feet). The Ronald Reagam building is the largest Washington, with an area of approximately 3.1 million square feet. 19% of the District's total area is parkland.