[DoodleDawg]

Yes, and I seem to recall that Texas, as a condition to join The Union, required a clause giving them the specific right to withdraw from The Union if they determined that it was within their best interests.

Here's the Treaty of Annexation. I don't see the clause you're referring to. Can you point me to the document that contains it?

[upcountryhorseman]

I don’t know the specific document, perhaps a viewer will
come up with it.