(State and LocalLEA--Authority to Enforce Immigration Law.)
"The law on this question is quite clear: arresting aliens who have violated either criminal provisions of the INA or civil provisions that render an alien deportable "IS WITHIN THE INHERENT AUTHORITY OF STATES." And such inherent arrest authority has never been preempted by Congress.
The source of this authority flows from the states status as sovereign entities. THEY ARE SOVEREIGN GOVERNMENTS possessing all residual powers not abridged or superceded by the U.S. Constitution. (Emphasis. Added)