https://www.theepochtimes.com/24-states-sue-biden-admin-over-covid-19-mandates-for-children-staff-in-head-start_4171280.html

Today In History, 1860 - South Carolina Becomes First State To Secede From Union:

Abraham Lincoln's election of 1860 resurrected fears in many Southern States over State Rights. Just a few decades earlier, 1832-1833, there was a conflict that almost led to South Carolina seceding then, called the "Nullification Crisis". The Nullification Crisis was a response by South Carolina to the "Tariff of Abominations", which was a tariff passed by congress designed to protect industry in the North, at the expense of the South. South Carolina responded, declaring that the tariff was unconstitutional and therefore null and void within the sovereign state. This event nearly led to violence and was one of many events that eventually led to secession, which then led to Civil War.

Remember that secession came first. When the states seceded slavery was still perfectly legal in the South. Many people today think that Lincoln freed the slaves, and then the South reacted by seceding. That's not the case at all. Lincoln did not make a move to end slavery until 2 years into the war. Matter fact if the Civil War never happened it is unlikely that Lincoln would have made the move at all. In fact during his inaugural address Lincoln defended the "Corwin amendment", which protected slavery in the South against federal power. Lincoln did campaign on stopping the expansion of slavery into new territories, but never to end it where it was already legal. Even in late 1862 President Lincoln wrote a letter to Horace Greeley, the editor and founder of the New York Tribune. In this letter Lincoln wrote "If I could end the war without freeing a single slave, I would". Meaning Lincoln understood that the issue was far bigger than just slavery. If it were that simple he'd have ended the war immediately. (That letter can still be found easily online)

On December 17, 1860 South Carolina delegates met in the city of Columbia at a convention and unanimously voted 169-0 to withdraw from the union. A few days later in Charleston an ordinance of secession was drafted and adopted on December 20, 1860. Both President-Elect Lincoln, and President James Buchanan viewed the ordinance as illegal, and the rest is history.