Andrew Jackson fought against the Second Bank of the United States and states' rights to secession. Jackson believed the Bank had too much power and worked to undermine its influence by withdrawing federal funds and vetoing its charter renewal. This led to increased tensions between Jackson, Henry Clay, and the Whig Party. The Nullification Crisis further strained relations as South Carolina threatened to secede over high tariffs, which Jackson firmly opposed by threatening military enforcement of federal laws. The Jackson era came to an end as economic troubles hindered Van Buren's presidency and the Whigs gained power under William Henry Harrison.