who is william tweed
William M. Boss Tweed (April 3, 1823 â April12, 1878) was an American politician and head of Tammany Hall, the name given to the Democratic Party political machine that played a major role in the History of New York City politics from the 1790s to the 1960s.illiam M. Boss Tweed (April 3, 1823 â April12, 1878) was an American politician and head of Tammany Hall, the name given to the Democratic Party political machine that played a major role in the History of New York City politics from the 1790s to the 1960s.