Who did the whigs become and why did they split up?

The Whig Party, which emerged in the 1830s, eventually dissolved in the 1850s, largely due to internal divisions over the issue of slavery. As the nation became increasingly polarized, factions within the party disagreed on whether to support the extension of slavery into new territories. This discord led to a significant realignment in American politics, with many former Whigs joining the newly formed Republican Party, which opposed the expansion of slavery. The party's collapse reflected broader social and political tensions in the United States leading up to the Civil War.