In fact, the ratification documents of Virginia, New York and Rhode Island explicitly said they held the right to resume powers delegated should the federal government become abusive of those powers. The Constitution never would have been ratified if states thought they could not regain their sovereignty — in a word, secede.
Walter Williams
Right, that was the Founder's definition of the kinds of "necessity" which compelled them in 1776 to issue their Declaration of Independence.
They also believed that mutual consent was all the authority needed in 1788 to abolish the old Articles of Confederation in favor of their new Constitution.
But no Founder or later President ever proposed or supported unilateral, unapproved declarations of secession at pleasure.
They considered those to be rebellion, insurrection, domestic violence, invasion and/or treason.
And those they opposed with all the military force necessary, be it 1806 (Burr), 1814 (Hartford), 1830 (S.Carolina) or 1860-1 (Confederates).