The doctrine of “NULLIFICATION.”
According to Vice President John C. Calhoun, the federal government only existed at the will of the states. Therefore, if a state found a federal law unconstitutional AND detrimental to its sovereign interests, it would have the right to “nullify” that law within its borders. Calhoun advanced the position that a state could declare a national law void.
http://www.ushistory.org/us/24c.asp
In regard to immigration law state & cities have been practicing nullification for some time.
Isn't it fun to watch Jerry Brown and Gavin Newson channel John Calhoun?