Kammala wannan jumla: "John Langdon yana da dogon lokaci da kuma aiki a cikin rayuwar jama'a, wanda ya hada da sabis a New Hampshire House of Representatives, da New Hampshire Majalisar Dattijai, da kuma
Majalisa ta biyu. Ya zama Shugaban New Hampshire a 1785 da 1788, kuma daga bisani an zabe shi Gwamnan jihar sau shida, a 1805, 1806, 1807, 1808, 1810, da 1811. Aboki na kusa da kuma mai ba da shawara ga Thomas Jefferson, John Langdon ya kasance wakili ne na Yarjejeniyar Tsarin Mulki ta Tarayya a 1787 kuma an zabe shi shugaban farko na Majalisar Dattijan Amurka. "