Challenge and query no Sessession

WI the Southern leadership reacted in a normal way to having lost the 1860 election, they hated the guy who one but well he did win so they would have to live with it.

How could this happen?

How much could the Southern influence in Congress, especially the Senate, have limited what a Lincoln adminsitraton could do?

How long wold it take for the last Southern State (South Carolina??) to abolish slavery?
 
This is hard to do the closer you get to 1860.

You probably need lower levels of hysteria throughout the South. No John Brown's raid.

Also, you probably need Lincoln to break his post-election silence early on and give some specific reassurances to the South. Pre-election too. The biggest concerns would be promising not to mail abolition literature to the South (which is why OTL Lincoln appointed the conservative Blair to the Postmaster General position) and promising not to appoint federal officials in the South with an eye to creating a local Republican party. I don't know if you can plausibly get Lincoln to commit to this last point, however.

Also, you probably need an influential and trusted southerner (who?) to expose all the crazy stories in the South in 1860 about rebellions and abolition spies as lies. Better yet, have some prominent fire-eater caught in a scandal that includes the fire-eater deliberately making up inflammatory rumors for political effect.
 
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