Suppose, somewhere down the road, the mass population states on the coasts dominate the country politically to the point that the left is locked into unbroken decades of control of the three branches of government. The system of checks & balances no longer works. The two party system no longer works. The federal government casually restricts religious freedom, freedom of speech, freedom of assembly, and other constitutional rights, having asserted that their “interpretation” of the Constitution raises the interests of homosexuals, feminists, illegal immigrants, and others above those traditional rights.
The large states filled with leftist voters flat out won't allow the conservative states to leave. Furthermore, the population of those large states continues to grow massively as the federal government has thrown the borders wide open to increase the size of its own constituency. It accomplished this by deliberately violating the immigration laws by not enforcing them.
What then? Can the aggrieved states peacefully seek their leave without the consent of the other states, on the grounds that the compact (the Constitution) has already been broken? Or are they trapped in this post-Constitutional situation forever?
You can secede for any reason you want, or for no reason at all if that's your choice. The why is unimportant to me and is only of concern to those wanting to leave. My position is and always has been that if it is clear that the majority of the people of a state or states wishes to leave the Union and makes this desire clear to Congress, then it is Congress' duty to negotiate a fair and equitable settlement of all potential issues of disagreement and then vote to allow them to leave. If the state chooses armed conflict instead of negotiated and peaceful separation then all bets are off. They fight and win or they fight and lose, the ultimate outcome is in their hands. But in the end there is one, and only one peaceful way to separate and that through negotiation and agreement on both sides of the issue.