(15) "United States" means—
(A) a Federal corporation;
(B) an agency, department, commission, board, or other entity of the United States; or
(C) an instrumentality of the United States.


http://www.law.cornell.edu/donors/solicit.php?http_referer=/uscode/html/uscode28/usc_sec_28_00003002----000-.html


Queen Elizabeth controls and has amended U.S. Social Security

http://www.opsi.gov.uk/si/si199717.htm
http://www.opsi.gov.uk/si/si1997/19971778.htm

With no constitutional authority to do so, Congress creates a separate form of government for the District of Columbia, a ten mile square parcel of land (see, Acts of the Forty-first Congress," Section 34, Session III, chapters 61 and 62).

Act 1871 allows the "Corp US" to control the country in the place of the natural Government
http://www.teamlaw.org/DCOA-1871.pdf