"Washington Governor Orders State Not to Make Arrests Over Immigration Status"
Then, send in a company of federal ICE agents to do the arrestin' ...!
Sooner or later, it's going to come down to a naked "test of power" between Trump and state officials who will not comply with federal immigration laws.
This may involve actually taking one or more high-level state officials into federal custody.
By the force-of-arms, if required.
Preposterous, you're thinking.
But.. consider George Wallace standing defiantly in the schoolhouse door.
The only way we're going to win on immigration -- as the federal government won on integration -- is one or more repeats of the same.
Otherwise, it's going to be much more difficult, if not impossible.
"Examples" must be made from which lessons will be learned.
Addendum:
And yes, I'd smile to see the governor of my state (CT) being led away in handcuffs by the feds!