Okay Jake I have tried to be patient in the hopes that you could complete your task without further instruction. You have proven incapable. So, here is an example for you.
James Madison was a founding father and considered the author of the Constitution. This is his statement on secession during the 1787 constitutional convention in which a proposal was made to allow the federal government to suppress a seceding state:
"A union of the states containing such an ingredient seemed to provide for its own destruction. The use of force against a state would look more like a declaration of war than an infliction of punishment and would probably be considered by the party attacked as a dissolution of all previous compacts by which it might be bound."
See how easy that was Jake. Now its your turn.
If you think Madison was saying secession is legal, then you are an idiot.
Here is the entire context. I will bold the parts you conveniently left out:
Mr. Madison, observed that the more he reflected on the use of force, the more he doubted the practicability, the justice and the efficacy of it when applied to people collectively and not individually.--, A Union of the States containing such an ingredient seemed to provide for its own destruction. The use of force agst. a State, would look more like a declaration of war, than an infliction of punishment, and would probably be considered by the party attacked as a dissolution of all previous compacts by which it might be bound.
He hoped that such a system would be framed as might render this recourse unnecessary, and moved that the clause be postponed. This motion was agreed to nem. con.