Following the sudden death of William Henry Harrison, Vice President John Tyler assumed the presidency. "His Accidency" quickly ran afoul of his own party, causing controversy over his bias towards states' rights and his veto of the national bank and tariff bills. Some Whigs in Congress attempted to impeach him. His entire cabinet, except Secretary of State Daniel Webster, resigned. He died during the Civil War while serving in the Confederate Congress. Learn more with this biography from American Experience: "The Presidents."