SEC chief bolstered watchdog powers, helped stabilize markets post-Enron

Mr. Donaldson had been planning to ease into semi-retirement in late 2002 after a career that included serving as a top deputy to Secretary of State Henry Kissinger in the early 1970 s, heading the New York Stock Exchange from 1990 to 1995 and two years leading the health-care giant Aetna. Then came a call from President George W. Bush, whose family had close ties…