Key Economic Policies of the Era of Good Feelings

The 'Era of Good Feelings' is often regarded as a period of relative political tranquillity in the United States, extending from the end of the War of 1812 through the presidency of James Monroe. Despite its name, various underlying issues arose during this time that would later contribute to sectional tensions. One critical point of contention was the debate surrounding economic policies and their impact on different regions of the country. Which of the following events or policies during this era signified the beginning of economic sectionalism?