Plus one Supreme Court decision and the writings of James Madison. But hey, what did he know about the Constitution anyway?
So what have you got showing support for secession without consent of the states?
Amendment IX:
The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people.
Amendment X:
The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.
And there is also this:
When in the Course of human events it becomes necessary for one people to dissolve the political bands which have connected them with another and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature’s God entitle them, a decent respect to the opinions of mankind requires that they should declare the causes which impel them to the separation...
Do you recognize that?
How about this?
"The federal government, then, appears to be the organ through which the united republics communicate with foreign nations, and with each other. Their submission to its operation is voluntary: its councils, its sovereignty is an emanation from theirs, not a flame by which they have been consumed, nor a vortex in which they are swallowed up. Each is still a perfect state, still sovereign, still independent, and still capable, should the occasion require, to resume the exercise of its functions, as such, in the most unlimited extent.
"But until the time shall arive when the occasion requires a resumption of the rights of sovereignty by the several states (and far be that period removed when it should happen) the exercise of the rights of sovereignty by the states, individually, is wholly suspended, or discontinued, in the cases before mentioned: nor can that suspension ever be removed, so long as the present constitution remains unchanged, but by the dissolution of the bonds of union. An event which no good citizen can wish, and which no good, or wise administration will ever hazard."
St. George Tucker