BERKELEY – William McChesney Martin, a Democrat, was twice reappointed to the job of Chairman of the United States Federal Reserve by Republican President Dwight D. Eisenhower. Paul Volcker, a Democrat, was reappointed once by the Reagan administration (but not twice: there are persistent rumors that Reagan’s treasury secretary, James Baker, thought Volcker was too invested in monetary stability and not invested enough in producing strong economies in presidential years to elect Republicans).