[TBP]

Secession is not forbidden by the Constitution. Secession without the consent of the states is.

Where in the Constitution is this?

[Non-Sequitur]

Where in the Constitution is this?

Implied by Article I and Article IV which grant Congress sole power to admit states, and the power to approve changes of status once they've been admitted.

[central_va]

TBP,
Let me explain, N-S is essentially a copperhead with a guilt complex. He is a constitutionalist, even if the Constitution has been raped by the left and brought us to the brink of Marxism/socialism he, and others(neo-Yankees) still bow at the alter of Federalism. He also believes that if a state(s) begs like little school girls and ask permission they can leave this abysmal union that was “preserved” 140 years ago by his misguided ancestors. I have no idea where that comes from, he may be “touched”.