Worried that the foundation’s operating revenues depend too heavily on Mr. Clinton’s nonstop fund-raising, the three Clintons are embarking on a drive to raise an endowment of as much as $250 million, with events already scheduled in the Hamptons and London. And after years of relying on Bruce R. Lindsey, the former White House counsel whose friendship with Mr. Clinton stretches back decades, to run the organization while living part-time in Arkansas, the family has hired a New York-based chief executive with a background in management consulting.

Legacy planning. Smart.