That was a decisive moment in Lincoln’s career, and that’s the situation he faced when he got up to give his “House Divided” speech on June 16th of 1… - Harry V. Jaffa

And Lincoln in his Cooper Union speech, which he gave in February of 1860, raised the question, 'What can we do to satisfy our Southern brethren? No assurances that we give them that we will have no intention of interfering with the institution of slavery where it exists will satisfy them. We must get rid of all anti-slavery sentiments from our state constitutions'.

Now let me trace for a moment the sequence of events that led up to the secession crisis. Prelude to Southern Secession. I'll begin by saying that the decisive act of secession—the secession which caused all future secessions—was not what happened after Lincoln’s election. It was the secession of the seven states of the Deep South from the Democratic convention in Charleston of 1860. As far as I know, Mr. DiLorenzo doesn’t even know anything about this. He can still comment on that when he wants to.

He didn't care whether slavery was voted up or down, he cared only for the sacred right of the people to make that decision. Why the right of the people should have been sacred, if the results of the exercise of that right were indifferent, Douglas never undertook to say.