[Sherman Logan]

In fact, our Founders' Constitution specifically addresses the need for Federal response to "rebellion", "insurrections" "invasion", "domestic violence" and "treason" -- all of which were in play in early 1861.

I think you forgot one.

The United States shall guarantee to every State in this Union a Republican Form of Government

Pretty difficult to do it states can leave at will.

[RegulatorCountry]

The United States shall guarantee to every State in this Union a Republican Form of Government. Pretty difficult to do it states can leave at will.

But then there were States not in this Union, were there not? You're wresting Constitutional language just as badly as any strange religious cult wrests Biblical language. Do sets and subsets ring a bell? Does legally requiring that every car on a public roadway be in good repair with insurance mean that no car can leave the public roadway, lol? Has every State even been guaranteed a Republican form of government? That certainly wasn't the case in former Confederate states during Reconstruction, and hasn't been since.