Now lets move the 1859 the Southern leaders see a weak waffling president in Buchanan and the fires of insurrection are lighted. In 1860, Southern leaders see a country lawyer from IL. become president and again they believe they have a weak president to contended with and the fires of insurrection explored.
President Lincoln reinforces this view(of weakness) with his first inaugural address where he tries to appease the leaders of the insurrection. This act appeasement reinforced Southern leaders view he was weak and fueled the fires of the insurrection that will lead to war.
I argue again:
Abe Lincolns act of appeasement(show of weakness) to leaders of the insurrection only provoked the leaders to increase their demands and set our nation toward civil war.
If only Lincoln had followed the precedents set by Washington and Jackson and forcefully rejected the insurrection demands and show resolve the war might never had happen.
I don't follow your thread of logic here. A 'weak' president lead the south to secede?
So a 'strong' president would have kept them in the union.
Hence, every previous president must have been strong...