1. Congressional Representation: The number of representatives each state had in the House of Representatives was based on its population. This meant that the North, with a larger population, had more representatives than the South.
2. Electoral College: The President of the United States was chosen through the Electoral College, where each state's electoral votes were determined based on its population. This gave the North a significant advantage in presidential elections.
3. The Three-Fifths Compromise: The Three-Fifths Compromise of the Constitution counted enslaved individuals as three-fifths of a person for the purpose of representation and taxation. This gave the Southern states a boost in their congressional representation, despite the fact that enslaved people could not vote.
4. Fugitive Slave Act: The Fugitive Slave Act of 1793 required states to return escaped enslaved individuals to their owners, even if those individuals had fled to states where slavery was illegal. This helped to maintain the institution of slavery and the power of the Southern slaveholding class.
5. Missouri Compromise: The Missouri Compromise of 1820 admitted Missouri as a slave state and Maine as a free state, maintaining a balance between the number of free and slave states in the Union. It also established a boundary along the 36°30′ parallel, prohibiting the expansion of slavery north of this line.
6. Kansas-Nebraska Act: The Kansas-Nebraska Act of 1854 repealed the Missouri Compromise and permitted the extension of slavery into the Kansas and Nebraska territories, allowing voters in those territories to decide whether to become free or slave states. This led to the rise of tension and conflict between pro-slavery and anti-slavery forces, contributing to the escalation of tensions between the North and the South.
These mechanisms were designed to address the power dynamics and sectional interests between the North and South. However, they failed to fully resolve the underlying conflicts related to slavery and states' rights, which eventually escalated into the American Civil War.