“I am the last President of the United States!”
James Buchanan (1791–1868) American politician, 15th President of the United States (in office from 1857 to 1861)
A statement he is reported to have made several times to others after the secession of South Carolina, or as early as after the election of Abraham Lincoln (1860), as quoted in Lincoln's War: The Untold Story of America's Greatest President as Commander in Chief (2004) by Geoffrey Perret.