Cool, so we can into civil war
Even better: you might see two, count 'em, two civil wars.
If worse goes to worse and the South secedes, likely run by John C. Calhoun who was historically against the tariffs with Jackson as the Head of State. Then, we have two outcomes.
1. South comes out victorious (possibly with British aid) the North is basically a failed state after losing half of the nation. British might be eager for round two, Mexicans look to expand, while the French withdraw what they can. I see little flavor in this scenario, honestly. It's would radically change the timeline and basically is everyone beating up the Union, and that isn't really fun.
2. (Which I feel would be much better for the timeline.) Quincy Adams decisively beats the South and reintegrates them to the Union. States-rights has taken a nasty blow as the national government is all-the-more powerful. The catch is that historically Adams believed that keeping the Union together was more important than the immediate abolition of slavery. Thus the National Republicans in all their pleasure announce a Reconstruction of the South to ensure federalism and agree not to touch slavery as they could never bring back the South after that. Overall, the South is hurt by the loss, but not completely. Jackson becomes a living martyr to the Southern Democrats and symbolically provides hope to the Dixie people who wish his legacy to live on.
Within a year of his victory, John Quincy Adams is assassinated by a states rights advocate and Vice President Henry Clay of Kentucky handles the Reconstruction. Being from below the Mason-Dixie line he implements a scaled-down version of the Adam's plan which ultimately favors rebuilding over focusing on forcing federal rule. This left the Democrats more room for a political comeback as solid Republican influence is now draining. Henry Clay wins reelection, but it is becoming troubling to the Republicans as Democrats are beginning to make progress in the North through the debate on trade. The Panic of 1837 hits and Clay is left with the blame for it. In 1840 Martin van Buren becomes President after defeating William Harrison and rolls back many of the federalist measures enacted by the Republicans and moves for a free-trade stance in America. President Van Buren is seen as the Democratic link between the North and South and worked to improve the economy. Van Buren barely wins in 1844 on the stance that he would end the Reconstruction of the South and let the Dixie return to their ante-bellum. In 1845 the South morns the death of Andrew Jackson who dies of tuberculosis. The national figureheads of both the Republicans and Democrats now both rest in peace.
Meanwhile some Republican Congressmen are furious by Van Buren's acts and address a series of issues to shake the Democratic government. The abolition faction of the Republican party is albeit a small minority and thus slavery issue is not a priority. Platforms are laid down as the Republicans wish to promote federalism, protectionism, and national unity, while the Democrats cling to states-rights, free trade, and Constitutionalism. However overtime the abolitionist faction of the Republicans grows as events such as John Brown's Raid make the news. On the opposite side Democrats become more determined to retain slavery, which they see as an extension of states-rights. Presidents between this era are mostly either Pro-Union Republicans or Pro-Slavery Democrats, which forms an unofficial bloc against Slavery-issued legislation. But slavery becomes a topic of debate in the 50s, which expands into the 60s.
Representative Abraham Lincoln becomes a Leader among Republican moderates who to seek a united Republican stance. Eventually Republicans soft stance on slavery begins to deteriorate as Northerns become more and more restless of it. In the late 60s Republicans become open advocates of Westward expansion and rapprochement towards Britain to do so as British influence blocks the United States from Mexico, while Southern Democrats are staunchly against the expansion of abolitionism into the West. In 1868 Abraham Lincoln becomes a Senator of Illinois after defeating an unknown Northern Democrat, and ganders support for Republican unity. The same year in the 1868 Presidential election Democrat Horatio Seymour defeats the radical Republican abolitionist Salmon P. Chase. Chases' threat to become President caused many Southerners to elect Democratic candidates of the Pro-slavery faction instead of Pro-Unionists. Tensions reach a boiling point in the 70s as President Horatio Seymour fails to hold together the 'Status-Quo' coalition of Pro-Union Congressmen and Southern Democrats, as Southern Democrats beg Seymour to quickly pass pro-slavery legislation. President Seymour, however, refuses to give into Southern pressure and expresses his loyalty to maintaining the Union. In 1870 Republicans are sweep into Congress but fail to reach the two-thirds majority needed to override the Democratic veto.
In the Democratic party Southern Democrats curse Seymour's incompetence to salvage the Democratic lead. Southern Congressmen take full control of the party and rally around long-time Senator of Kentucky John C. Breckinridge to fight for the Southern way of life. On the other side of the aisle, Abraham Lincoln consolidates the Republican factions in the wake of the "Southern resurgence". It is now December 11th, President Horatio Seymour prepares to enter his last year in office with virtually no Congressional support. The Southern Democrats have largely split from the Northern Democrats led by Samuel J. Tilden. As of now the Southern Democrats support Breckinridge, but are wary as Lincoln's rise in the unity Republican nomination. Will Lincoln win verses the divided Democrats? Can Breckinridge muster votes outside the South? Does Tilden have what it takes to sap the Republicans and the Southerners from victory? All candidates prepare for the 1872 Presidental election which would ultimately decide the fate of the Union.
