So what abuses of the compact had the US government committed when South Carolina announced it was seceding? That means you can't list anything Lincoln did or anything they thought he might do. Now, what were the abuses so great they abrogated the Constitution?
>>>So what abuses of the compact had the US government committed when South Carolina announced it was seceding?<<<
Are you kidding? The abuses started before the secession, with the prospect of tariffs that favored the industrial north if Lincoln was elected, to the detriment of the agricultural South. A protectionist tariff was a key plank of the Republican National Convention in Chigago, where Lincoln received the support of almost all of the Pennsylvania delegation, and most of the New Jersey delegation. The Senate passed the Morill tariff two days before Lincoln took office.