How did American politics change in the aftermath of the 1854 Kansas-Nebraska Act?

Question

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The Kansas-Nebraska Act led to a split in the Whig party (which had previously been divided on sectional lines) and ultimately led to its dissolution. The act also spurred the formation of the Republican party, which gained strength in the North. The Democratic party remained intact but lost support in the North due to its support of the controversial act.

How Did American Politics Change in the Aftermath of the 1854