[rockrr]

Well, if S.C. secedes, the U.S. Constitution no longer applies to S.C., which becomes a duchy or republic of its own.

Only if they do it legally.

[rustbucket]

Only if they do it [secede] legally.

What way is that? What constitutional provision controls the issue? Were Hamilton and Jay (two of the authors of the Federalist Papers outlining what the Constitution meant) wrong about what the Constitution meant?