The Missouri Compromise of 1820 maintained the balance of power in the Senate by admitting Missouri as a slave state and Maine as a free state. The compromise also established the 36°30' line, with states north of this line being admitted as free and states south being slave. The Nullification Crisis arose from South Carolina's opposition to high tariffs, which were seen as benefiting Northern industries at the expense of Southern agriculture. Henry Clay's Compromise Tariff of 1833 lowered tariffs and prevented secession or civil war. Sectionalism between the industrial North, agricultural South, and expanding West increased tensions over slavery and states' rights. The Compromise of 1850 and Kansas-Nebraska Act attempted but