[rockrr]

The 10th Amendment doesn’t apply here because the constitution defined the mechanism for admission and consent authority for the construction and definition of the states to the Congress in Article IV, Section 3, Clause 1.

[IronJack]

Artice IV, Section 3 defines a process for the ADMISSION of states; it makes no provision for -- or prohibition against -- secession.

And the Enumerated Powers clause creates the authority by which states can declare sovereignty, whether you concede that the Tenth Amendment does or not.