Which politician introduced the Kansas-Nebraska Act in 1854 and popularized the idea of popular sovereignty?

• A. Henry Clay
• B. Stephen Douglas
• C. Daniel Webster
• D. Ulysses S. Grant

Answer: (B)

The main idea being tested is who led the push for popular sovereignty and authored the Kansas-Nebraska Act in 1854. Stephen Douglas, a senator from Illinois, introduced the act, which created the territories of Kansas and Nebraska and allowed their residents to decide slavery by popular vote. This approach of letting the people determine the issue was the embodiment of popular sovereignty and effectively repealed the Missouri Compromise line that had restricted slavery north of a certain latitude.

Douglas promoted this idea as a practical way to advance westward expansion and let settlers decide the fate of slavery for themselves. The act’s result was highly consequential: it intensified sectional tensions because both pro-slavery and anti-slavery factions rushed to influence the vote in the new territories, leading to violence and political upheaval known as Bleeding Kansas.

Understanding the other figures helps place this in context. Henry Clay was associated with the earlier Missouri Compromise and other compromises aimed at reconciling free and slave states. Daniel Webster supported the broader compromise efforts but not this specific act. Ulysses S. Grant rose to prominence as a Civil War general long after this episode and did not draft the Kansas-Nebraska Act.

So, the politician who introduced the Kansas-Nebraska Act and popularized popular sovereignty is Stephen Douglas.