On a luminous day earlier this summer, a small group clustered on the Truman Balcony of the White House for a get-acquainted ritual given by Hillary Rodham Clinton. A visiting choir was singing below in the Rose Garden to the President. The flowers were voluptuous, the iced tea tangy. Deputy White House counsel Vincent Foster moved through the group, hunching his shoulders so that he was closer to the shorter guests, a beaded chain holding his White House pass hanging outside his pinstripe suit -- a shackle perhaps. But that is an afterthought.
Vince Foster's gentle pug features were uplifted by...