There is no such requirement in the US Constitution. Claiming that there is is just projecting one's own personal opinion onto the Constitution. This is "Penumbra" sort of stuff, and it all depends upon who is visualizing the "Penumbra" they want.
This time, it’s not slaves that would be freed it would be the American people would be freed from Liberalism and the Corporate Owned media that props it up.
That "Corporate owned media" is by an large controlled out of New York. The media is a tool to keep the Washington DC spending cartel pumping money through the pockets of the men who control the media systems.
The Media supports liberalism, because liberal policies keep the US government money pumping through all the right hands.
The Civil War is what established this New York/Washington DC power cartel, and they have been controlling the nation ever since.
see the post I just made to Lurker a couple mins ago.
I agree with a lot of what you said but if your trying to argue that the Constitution was not at all involved in the controversy called the Civil War lots of people disagree with you.