Which of the following groups fought the expansion of slavery into the western territories by arguing that slavery was morally wrong and that free labor was better for the economy than slavery

Free-soil Party of the following groups fought the expansion of slavery into the western territories by arguing that slavery was morally wrong and that free labor was better for the economy than slavery. There Name free-soil party was named like that so slaves wouldn't have to have contact with anytype of labor(Digging,Picking cotton etc)
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