What evidence reveals that sectional differences regarding the economic and allocation of political power were growing in the period of 1809-1824?

Between 1809 and 1824, sectional differences in the United States were increasingly highlighted by economic disparities and political power struggles. The emergence of distinct regional economies—such as the industrializing North, the agrarian South, and the expanding West—fueled tensions over issues like tariffs and internal improvements. The Missouri Compromise of 1820 exemplified these growing divisions, as it sought to balance the interests of slave and free states, revealing deep-seated conflicts over the expansion of slavery and political representation. Additionally, the rise of distinct political factions, such as the Democrats and National Republicans, underscored the fragmentation of national unity along sectional lines.