This may be the definitive word for this Administration: States have no powers, even within their own borders, and their Laws are ALWAYS inferior to Federal law (and edicts made without benefit of law, it seems).
Couple of observations: first, this is the exact position of the Federal Government which started the Civil War. Note that the "State's Rights" position this time has a tad more MORAL basis. Second, there has been a sea change in the attitude of the Feds which brings on this statement of Holder's: he would NEVER have made this statement seven months ago.
The Imperial Presidency has just been declared.
You can either bow your back like a good imperial subject and put up with the Imperial Presidency and all the corruption which goes with it, or you can grab your ruck and rifle, then leave your home for the last time.
Did I miss any choices?