Congress passed the 23rd Amendment

June 16, 1960

Congress passed the 23rd Amendment

The federal government moved to Washington, DC, in 1800. For 160 years, the residents of that city were denied the right to vote for the President and Vice President of the United States. On June 16, 1960, Congress passed the 23rd Amendment which would change that. Ratified by the states in March 1961 citizens who were otherwise eligible to vote, could now vote for the President and Vice President.

http://www.eyewitnesstohistory.com/capital.htm

http://www.archives.gov/exhibits/charters/constitution_amendments_11-27.html