Groucho and Other Solicitations Made to an Ex-President. By Thomas F. Schwartz It was not uncommon in the Nineteenth Century for sitting and former presidents to publically endorse commercial products and services, usually without compensation. In 1862, Abraham Lincoln wrote a glowing endorsement for his foot doctor: “Dr. Zacharie, has, with great dexterity, taken some … Continue reading Who’s Buried in Grant’s Tomb?