Thomas Jefferson
Thomas Jefferson, the third President of the United States, was the architect and primary sponsor of the Lewis and Clark Expedition. His lifelong fascination with the American West, combined with the strategic opportunity presented by the Louisiana Purchase of 1803, led him to commission the Corps of Discovery under the command of his private secretary, Meriwether Lewis. Jefferson drafted the detailed instructions for the expedition, emphasizing scientific observation, diplomatic relations with Native nations, and the search for a commercially viable route to the Pacific. He personally supervised Lewis's preparation, arranging training with leading scientists in Philadelphia. The expedition fulfilled Jefferson's vision of American expansion and scientific inquiry, though the hoped-for all-water route to the Pacific proved not to exist.
Portrait: Rembrandt Peale, 1800, White House Collection, Public Domain
