Stanley Steingut (May 20, 1920 – December 8, 1989) was an American politician, New York Democratic Party leader, insurance brokerage owner, and lawyer. He took over his father's position as boss of Brooklyn County Democratic politics and eventually parlayed that position to become Speaker of the New York State Assembly. Before reaching that office, Steingut engaged in a power struggle along with Reform Democrats beginning in the early-1960s, when he was an early and powerful supporter of Robert F. Kennedy's bid for Senate from New York. In the late 1950s, he was an early supporter of then-Senator John F. Kennedy’s bid for the nomination of the Democratic Party for the presidency. His support of both Kennedys caused a major rift with Tammany Hall Democrats led by then-Mayor Wagner. Those lo