A precursor for a War Between the States came in 1832, when South Carolina called a convention to nullify tariff acts of 1828 and 1832, referred to as the "Tariffs of Abominations." 

A compromise lowering the tariff was reached, averting secession and possibly war. The North favored protective tariffs for their manufacturing industry. The South, which exported agricultural products to and imported manufactured goods from Europe, favored free trade and was hurt by the tariffs. Plus, a northern-dominated Congress enacted laws similar to Britain’s Navigation Acts to protect northern shipping interests.

Shortly after Lincoln’s election, Congress passed the highly protectionist Morrill tariffs.

That’s when the South seceded, setting up a new government. Their constitution was nearly identical to the U.S. Constitution except that it outlawed protectionist tariffs, business handouts and mandated a two-thirds majority vote for all spending measures.