What effect did sectionalism have on the era of good feelings?

The effect that sectionalism did have on the Era of Good Feelings is it made national unity more difficult. The Era of Good Feelings  was a period that started and promoted on national unity. The Congress adopted this economic program that includes having a national bank and a protective tariff. Sectionalism on the other hand, is only loyalty to the interests of a particular region and not entirely the nation.