This whole arguement reminds me of whether or not any states have the right to refuse Obamacare or the right to protect its own borders.
It is certainly an open question whether Obamacare is constitutional and hopefully those opposed will come up with a GOOD case to take to court. A bad case would be a disaster.
Arizona’s law is not in CONFLICT with federal law but actually suppliments it so the “Supremacy Clause” does not appear to truly apply contrary to de jedge’s allegation.
But the constitutionality of secession is not in question and never was if the greatest of our founders thoughts are considered.