What political party ran martin van buren for president in 1848 as an antislavery?

In 1848, Martin Van Buren was the presidential candidate for the Free Soil Party, which was formed primarily on an antislavery platform. The Free Soil Party opposed the extension of slavery into the western territories and sought to promote free land for settlers. Van Buren's candidacy represented a significant shift in political alignment, as he was previously a member of the Democratic Party.