Supernaturals in the area

Mage
D.C. has a major technocratic presence

The New World Order has several trained Men in Black that ensure no supernatural influence can reach the White House.

The Celestial Chorus is present near the Washinton National Cathedral.

Verbena a camp in the Rook Creek Park.

Hermetics of House Shaea

Virtual Adepts maintain a chantry in one of Washington's suburbs.

Hunter
The US government's hunter organizations, the CIA, FBI, SAD, NSA, IRS and ATF all have their headquarters in D.C.

The Society of Leopold has a major influence in Catholic University,

Vampire
Since the American Civil War, D.C. was nominally ruled by a Tremere named Marissa. In 1968, however, the warlock was assassinated and her protegé, Marcus Vitel, took her place as Prince of the city. Vitel ruled as one of the Ventrue clan for several decades.