The slavery issue was a bit hypocritical, since the North didn’t really have any cash crop that needed slaves. So their looking down their noses at the South was a but much.
That being said, Lincoln spent countless hours mulling over what to do about the freed and unfreed slaves: where would they go, how would they be treated (the Northerners didn’t want them looking for work any more than we today don’t want illegal aliens seeking jobs available for American citizens), should the Southern slave owners be financially compensated for their loss of “property,” etc., ad nauseum.
So, yes slavery was the resultant big issue evolving from the high tariffs on Southern products and numerous other non-slave issues.
don’t forget that Lincoln actually said about sending them back to Liberia or other countries but mostly get themnut of America
There were PLENTY of slaves up north - and I don’t mean freed slaves.
You raise a good point here. The North didn't need slaves because some of its labor-intensive industries -- like coal mining in Pennsylvania, for example -- had access to plenty of cheap labor who didn't cost anything to "buy" ... in the form of immigrants from Ireland and Wales.
There were no tariffs on southern products (at least none enacted by the US). Southern products were exported, and tariffs are enacted only on imports.
The north had plenty of cash crops. No cash crops needed slaves, as was shown by southern agricultural productivity after the war, when slavey was no more.