John Tyler was the 10th President of the United States, serving from 1841 to 1845. He became president after the death of William Henry Harrison, making him the first vice president to assume the presidency due to a vacancy. Tyler was a member of the Whig Party, but his presidency was marked by conflicts with his party, particularly over issues like the national bank and tariffs. During his time in office, Tyler focused on foreign policy, notably the annexation of Texas. His administration faced challenges, including opposition from Congress and internal party divisions. Despite these difficulties, Tyler's presidency set important precedents for future vice presidents.