What changes in political parties took place in the 1840s and 1850s?Help :/

The slavery issue changed political parties. The Whig Party collapsed, divided between anti slavery Northerners and proslavery Southerners. With this split, a Democrat won the 1852 campaign for president. Some Whigs joined the new American party.

Explanation:

Divided over the issue of slavery, the Whig party split in the 1850s. Most Northern Whigs joined the new Republican Party

Explanation:

hope this helps

where is the

answer:

it caused mass african migration, african populations to grow, african empires to topple, and racism against slaves to emerge.