Both Democrat President Buchanan and Republican President Lincoln expressed THEIR VIEWS that secession “at pleasure” was not constitutional or lawful.
THEIR VIEWS is a poor defense for preventing states to do what those state had the rightful and legal guarantee to do.
Lincoln destroyed states rights and little to nothing remains of the once great protection of the Constitution.
But of course they had no "rightful and legal guarantee" to provoke, start and declare war on the United States without suffering the consequences of such stupidity.
You people always fanaticize about a "right to secede", "RIGHT TO SECEDE" you claim.
But secession alone did not start Civil War, nor did forming a new Confederacy.
What started Civil War were the Confederacy's numerous provocations culminating in its assault on Fort Sumter, followed soon after by a formal declaration of war on the United States.
"Right to Secede" or "no Right to Secede", when you declare war on the United States, you will get your soft end whooped.
So don't do it. Just don't, FRiend.