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William Magear Tweed – often erroneously referred to as "William Marcy Tweed", and widely known as "Boss" Tweed – was an American politician most notable for being the "boss" of Tammany Hall, the Democratic Party political machine that played a major role in the politics of 19th century New York City and State.
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In politics, a boss is a person who controls a unit of a political party, although they may not necessarily hold political office.
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A political machine is a political group in which an authoritative boss or small group commands the support of a corps of supporters and businesses, who receive rewards for their efforts.
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Immigration, process through which individuals become permanent residents or citizens of a new country. Historically, the process of immigration has been of great social, economic, and cultural benefit to states.