The major platform of the Republican Party in the 1850s was an antislavery platform. Antislavery leaders opposed the extension of slavery into even more territories. Their opposition of slavery ended up helping them to join forces.
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Answer:
The Constitution provides that an amendment may be proposed either by the Congress with a two-thirds majority vote in both the House of Representatives and the Senate or by a constitutional convention called for by two-thirds of the State legislatures.
Explanation:
