How?
I'm asking because Jefferson did indeed face secessionist threats during his presidency. The North threatened secession over the Louisiana Purchase and again over his ill-conceived embargo. He made some concession and held the country together with statesmanship. Lincoln wasn't a statesman. He was an ambitions railroad lawyer with an economic agenda he intended to implement ho matter what.
You answered your own question. He did face secessionist threats during his presidency and he did address them. He didn’t let a bunch of hotheads rend our nation. He kept our nation whole.
Lincoln was a statesman but the rebellion was a forgone conclusion before he ever took the reins. The south never gave him anything but hard choices He accepted responsibility and made them.