One result of no secession is the US government will face a financial crisis, perhaps even going bankrupt. The Crash of 1857 left the South relatively untouched, but it had a big effect on the North's economy. Tariff income, the major source of government revenue had dropped by about 1/3 and government debt was accumulating rapidly.
The Morrell Tariff was a revenue tariff endorsed by President Buchanan to curb the spiraling national debt. It was tabled by southern obstructiionists in Congress who didn't care that the country's credit had become so bad public lands had to be pledged as collateral for Treasury notes.
That's not the only area where Southern congressmen were being obstructionist. Even when there wasn't blatant fraud to try to make Kansas a slave state, Southern obstructionists were voting down any entry of additional free states. These obstructionists were also voting down any proposal for a transcontinental railroad that didn't route it through Arizona-New Mexico.