From a Michael Schaffer Capital City column on politico.com headlined “America Is Sick of Presidents”:

The White House Historical Association was founded by Jacqueline Kennedy, and for the past four decades it has partially funded itself via the sales of annual Christmas ornaments depicting things like Warren Harding’s presidential railroad car or Benjamin Harrison’s introduction of electrified White House Christmas tree lights. Selling collectibles to fund preservation and education efforts at the historic residence is not exactly a controversial cause. But over the past decade or so, the organization has encountered an odd dynamic in sales patterns.