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Adams -Onis Treaty
A treaty with Spain giving the Amercian purchase for Florida, Which in exchange the U.S -
Senate Ratifies Guadalupe Hidalgo
The Senate ratifies the Treaty of Guadalupe Hidalgo. -
Free Soil Party Starts
Anti-slavery members of the Whig and Liberty parties join to form the Free Soil Party, which opposes the expansion of slavery into the newly acquired western territories. The party nominates former president Martin Van Buren as its candidate in the 1848 election; he wins 10% of the vote, splitting the Democratic base and facilitating the election of Mexican-American War hero and Whig candidate Zachary Taylor to the presidency.