To review, there are three concepts to determine before you begin writing your essay: the tone, the audience and the purpose. The tone is the attitude of the writer. Two factors that greatly affect the tone are audience and purpose. The audience of an essay is anyone who might read it.
The White House is not in a state. It is located in Washington, D.C. The District of Columbia is a federal district that Congress established in the late 1700s with land Virginia and  Maryland donated for the purpose of serving as home to the nation's capital.
The White House address is an easily remembered address, sometimes more often remembered than one's own address. The official White House address is: 1600 Pennsylvania Avenue, NW. Washington, DC 20500. The NW indicates the Northwest side of the White House, where incoming mail arrives and departs. The White House address for mail is the same as the street address listed above. The only difference is you add the White House line, as below: