However, Unionist sentiment remained strong among many in the South, and Buchanan sought to appeal to the Southern moderates who might prevent secession in other states. He proposed passage of constitutional amendments protecting slavery in the states and territories. He also met with South Carolinian commissioners in an attempt to resolve the situation at Fort Sumter, which federal forces remained in control of despite its location in Charleston, South Carolina. He refused to dismiss Interior Secretary Jacob Thompson after the latter was chosen as Mississippi's agent to discuss secession, and he refused to fire Secretary of War John B. Floyd despite an embezzlement scandal. Floyd ended up resigning, but not before sending numerous firearms to Southern states, where they eventually fell into the hands of the Confederacy. Despite Floyd's resignation, Buchanan continued to seek the advice of counselors from the Deep South, including Jefferson Davis and William Henry Trescot.[93]
Efforts were made in vain by Sen. John J. Crittenden, Rep. Thomas Corwin, and former president John Tyler to negotiate a compromise to stop secession, with Buchanan's support. Failed attempts were also made by a group of governors meeting in New York. 