Richard J. Daley was an influential American politician who served as the Mayor of Chicago from 1955 until his death in 1976. He was a member of the Democratic Party and played a significant role in shaping the city's political landscape during his tenure. Daley was known for his strong leadership style and his ability to maintain control over the city's political machine. Daley's administration focused on urban development and infrastructure improvements, including the construction of the Chicago Loop and the expansion of the city's expressway system. However, his time in office was also marked by controversy, particularly regarding issues of civil rights and police actions during the 1968 Democratic National Convention.