Answer :
The division of the whig party on the issue of expansion of slavery into the Kansas and Nebraska territories by the proposed Kansas-Nebraska Act led to the emergence of the republican party.
One of the two main political parties in the US is the Republican Party. Former Whig, Democratic, and Free Soil party members came together to form it in 1854, and they picked the name to allude to the Jeffersonian Republicans' concern for the national interest above local and state considerations.
The new party opposed the Kansas-Nebraska Act's provision for the expansion of slavery into the territories. Despite being weak in the South for more than a century after the war, it had a long period of national dominance thanks to its connection to the Union triumph in the American Civil War.
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