Quote Originally Posted by MMI View Post
Can't Arizona get round the "federal" problem by simply closing its borders to everyone who doesn't come from Arizona?

Over here, in the EU, therfe is no "supremacy" rule. In fact member states jealously guard the supremacy of their individual jurisdictions, and only in certain circumstances can European law override national law.
It has been a long time since I took government classes, but if I understand correctly this is not something we ( The State of Arizona ) can do. Very few U.S. states were sovereign prior to becoming states. Most were created from federal territories, and so do not have full sovereign rights, like the Republic of Texas just as an example.