1. In 1884, Grover Cleveland won the presidential election and became the first Democrat president of the United States since the Civil War. His victory also marked the end of a 24-year streak of Republican presidents.

2. In 1924, Calvin Coolidge won the presidential election with a landslide victory. This marked the first time that a Republican presidential candidate had won the African American vote since the end of Reconstruction.

3. In 1952, Dwight D. Eisenhower won the presidential election and became the first Republican president in 20 years. His victory also marked the beginning of a period of Republican dominance in national politics that lasted for over two decades.

4. In 1973, the District of Columbia Home Rule Act was passed by Congress, granting the District more autonomy and paving the way for the eventual election of a mayor and city council in 1974.

5. In 2008, Barack Obama won the presidential election, becoming the first African American president in U.S. history. His victory was seen as a historic moment for the country and helped to inspire a sense of hope and unity among Americans.