David Stockman
David Stockman was the budget director for President Ronald Reagan from 1981 to 1985. He was committed to reducing government spending, but left after disagreement with the Reagan's policies. In 1986, he wrote a book critcizing the Reagan administration called, The Triumph of Politics.
He eventually became senior managing director of a New York-based investment bank, the Blackstone Group, in the 1990s.
