Gesturing toward the White House, a senator once facetiously asked Calvin Coolidge, "Who lives there?" Coolidge replied, "No one. They just come and go." Though Coolidge was correct that occupants of the White House are only temporary tenants, their impact is often felt long after they move out. And perhaps nowhere is this more the case than with dining and entertaining. Each first family has left its own culinary imprint on the country and the executive mansion. Certainly not every Commander-in