Why didn't James Buchanan run for president in 1860?

James Buchanan did not run for president in 1860 primarily due to his unpopularity and the political turmoil surrounding his administration. By the end of his term, the nation was deeply divided over issues like slavery and secession, and Buchanan's handling of these crises left him with little support. Additionally, he believed he had fulfilled his duty and that it was time for new leadership to address the escalating tensions that would soon lead to the Civil War.