Which political party ran martin van buren for president in 1848 as an anti slavery candidate apex?

The political party that ran Martin Van Buren for president in 1848 as an anti slavery candidate was the Free Soil Party.

Explanation:

At the 1848 presidential election, the Whig Party nominated Zachary Taylor by a large margin. Millard Fillmore was nominated as his running mate.

Among the Democrats, Lewis Cass was nominated with William Butler as vice-president.

An important part of the Democrats opposed Cass's nomination, which was seen as pro-slavery. This group of Democrats left the party convention and founded the Free Soil Party and nominated former president Martin Van Buren and Charles Francis Adams as its candidates.

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