How did the “corrupt bargain” affect the US political party system in the 1820s?

The “corrupt bargain” refers to the 1824 presidential election, when the House of Representatives chose John Quincy Adams over Andrew Jackson, and Adams later appointed Henry Clay secretary of state. Jackson’s supporters saw this as an unfair deal and organized against Adams, helping create the Democratic Party under Jackson’s leadership. Thus, the correct choice is “The Democratic political party was formed.”

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