In your next to last slide of the conservatives vs. radicals lecture you state that the Northwest Ordinances did not allow territories to secede. Would that apply once the territories became states? Could the established states secede during or after the war?
The provision concerning states admitted to the United States out of the territories is that “such state shall be admitted, by its delegates, into the Congress of the United States, on an equal footing with the original states in all respects whatever…” The text is in Art. 5 of the Northwest Ordinance: