Final answer:
The residents of the District of Columbia gained the right to vote in presidential elections in 1961 with the passage of the 23rd Amendment, which provided them three electoral votes.
Step-by-step explanation:
The residents of the District of Columbia gained the right to vote in presidential elections in 1961 when the 23rd Amendment was passed. This landmark amendment provided three votes in the electoral college to the residents of Washington D.C., thereby allowing them to have a voice in selecting the President and Vice President of the United States.
Before this amendment, residents of the nation's capital did not have a say in presidential elections, despite being citizens of the country. The movement to extend suffrage to District residents was part of a broader effort to ensure that all Americans, regardless of their race, gender, or place of residence, had the right to participate in the democratic process. The passing of the 23rd Amendment was a significant achievement in the continuous journey toward more inclusive voting rights in the United States.