The 23rd Amendment to the United States Constitution was ratified on March 29, 1961. It grants residents of the District of Columbia the right to vote in presidential elections. Before this amendment, people living in D.C. did not have electoral representation in the Electoral College, which selects the President and Vice President. The amendment allows D.C. to have electors equal to the least populous state, ensuring that its residents can participate in the democratic process. However, it does not grant D.C. full voting representation in Congress, which remains a topic of ongoing debate and discussion.