Donald Regan
Donald Thomas Don Regan was the 66th United States Secretary of the Treasury, from 1981 to 1985, and White House Chief of Staff from 1985 to 1987 in the Ronald Reagan Administration, where he advocated Reaganomics and tax cuts to create jobs and stimulate production. Before serving in the Reagan administration, Regan served as Chairman and CEO of Merrill Lynch from 1971 to 1980. He had worked at Merrill Lynch since 1946 and before this he had studied at Harvard University and served in the United States Marine Corps, achieving the rank of lieutenant colonel.
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Source: Wikipedia