The Washington Hilton is a hotel in Washington, D.C. It is located at 1919 Connecticut Avenue, N.W. and was the site of the assassination attempt on President Ronald Reagan by John Hinckley Jr. on March 30, 1981.
Stan finds out that he altered the past in "The Best Christmas Story Never", resulting in no assassination attempt by John Hinckley Jr. and costing Ronald Reagan the 1984 Presidential election to Walter Mondale who promptly surrenders the US to the Soviet Union. Stan finds out that he has to make the assassination attempt when he fails to impress Hinckley with Jodie Foster in HIS version of Taxi Driver.