From Mother Jones:

“In issuing a nationwide preliminary injunction Tuesday, US District Judge William Orrick cited public comments by President Donald Trump, Attorney General Jeff Sessions, and other administration officials that warned cities that they would lose public safety funds if they did not comply with federal immigration agents’ attempts to locate and detain undocumented immigrants. “If there was doubt about the scope of the Order, the President and Attorney General have erased it with their public comments,” Orrick wrote.”

The full story can be viewed here: http://www.motherjones.com/politics/2017/04/federal-judge-halts-trumps-executive-order-sanctuary-cities