Oh and of course, the union was voluntary and was based on consent. Each state is sovereign and has the right to unilateral secession. That is the common understanding every state had when it ratified the US Constitution just 8 years after seceding from the British Empire and having their individual sovereignty recognized in the 1783 Treaty of Paris with Great Britain.
Best laugh I’ve had all day! Let’s just brush over the Declaration of Independence and Lexington and Concord and Bunker Hill, and Valley Forge, and Fort Ticonderoga and Washington crossing the Delaware, and, well, that whole Revolutionary War part!