The right of property in slaves was recognized by giving to free persons distinct political rights, by giving them the right to represent, and burthening them with direct taxes for three�fifths of their slaves; by authorizing the importation of slaves for twenty years, and by stipulating for the rendition of fugitives from labor.
We affirm that these ends, for which this Government was instituted, have been defeated, and the government itself has been made destructive of them by the action of the non�slaveholding states. Those states have assumed the right of deciding upon the propriety of our domestic institutions; and have denied the rights of property established in fifteen of the states and recognized by the constitution; they have denounced as sinful the institution of slavery; they have permitted the open establishment among them of societies, whose avowed object is to disturb the peace and to eloign the property of the citizens of other states. They have encouraged and assisted thousands of our slaves to leave their homes, and those who remain have been incited by emissaries, books and pictures to servile insurrection. But of course, it wasn't about slavery.
What in the heck are you talking about? It's not about why a state wants to secede. It's about whether they have the right to secede.
Do you know of any law which prohibits a state from leaving the Union?