The Cook County Democratic Party is a political party which represents voters in 50 wards in the city of Chicago and 30 suburban townships of Cook County. The organization has dominated Chicago politics (and consequently, Illinois politics) since the 1930s. It relies on a tight organizational structure of ward and township committeeperson (until 2018 legal name change, "committeeman") to elect candidates. At the height of its influence under Richard J. Daley in the 1960s, it was one of the most powerful political machines in American history. Party members have been convicted of public corruption. By the beginning of the 21st century the party had largely ceased to function as a machine due to the decline of political patronage following the issuing of the Shakman Decrees. The current Chair is Toni Preckwinkle. Organization and leadership Article I of the by-laws of the Cook County Democratic Party states that the party exists to "attract, endorse, and support qualified Democratic candidates for office, to develop positions on issues of public importance, to advance the ideals and principles of the Democratic Party, and to seek to improve the lives of the people of Cook County through effective, efficient, and fair government." The by-laws also state that the party must "promote Democratic political activity in Cook County and encourage broad and diverse political participation by Cook County Democrats regardless or race, color, creed, national origin, gender, physical ability or sexual orientation ... and take an active role in county, state, and national political efforts which have an impact upon the people of Cook County." The party was chaired by 31st ward committeeman Joseph Berrios from 2007 until April 2018, when Cook County President Toni Preckwinkle replaced him. The Executive Committee has eight other officers: two Executive Vice-Chairs, First Vice-Chair, City Vice-Chair, Suburban Vice-Chair, Secretary, Treasurer, and Sergeant-At-Arms. Each of the 50 wards of Chicago and the 30 suburban townships has its own committee and is represented in the Central Committee by an elected committeeperson (until 2018 legal name change, "committeeman"). In suburban Cook County, regional groups, such as the Southland Democrats, co-ordinate activities with their local Democratic township organizations and their committeemen. Article IV, Section 4 of the By-laws of the Cook County Democratic Party allows the Suburban Vice-Chair (a position currently held by Illinois State Senator Don Harmon) the authority to "convene caucuses and meetings, solicit support for the organization, assist the County Chair