The law is in place. Obumbo and Lynch put it in place. All Trump has to do is hit the button.
http://www.washingtontimes.com/news/2016/feb/24/justice-dept-promises-crackdown-sanctuary-cities/
“This is a very significant change, and we’re deeply grateful to you,” Rep. John Abney Culberson, Texas Republican, told Ms. Lynch at a hearing of the House Appropriations Committee.
He promised to provide Ms. Lynch with a list of sanctuary jurisdictions and urged her to scour the list and see who is refusing to comply.
“If they insist on paying it out of their policy, and they won’t honor detainers, and they won’t share information, you know, don’t ask for federal money unless you follow federal law,” he said. “Delighted to hear you’re moving in that direction, and we’re going to work with you cooperatively and in a supportive way to ensure that that happens.”
The moves are bound to anger immigrant rights advocates, who for years have cheered as hundreds of county and city governments, jails, and sheriff’s and police departments have adopted sanctuary policies.