You might want to find what can be done within the law and keep in mind that the courts are already involved.
Have you been paying attention to the six month saga of the president's travel ban? There always seems to be a lefty judge who will complicate the administrations plans as long as possible. The DOJ is going after the sanctuary cities however they can within the law.
8 U.S.C. § 1324 (a)(1)(A)(iii) Any person who knowing or in reckless disregard of the fact that an alien has come to, entered, or remains in the United States in violation of law, conceals, harbors, or shields from detection, or attempts to conceal, harbor, or shield from detection, such alien in any place, including any building or any means of transportation; shall be punished as provided in subparagraph (B)
8 U.S.C. § 1324 (a)(1)(B)(ii) A person who violates subparagraph (A) shall, for each alien in respect to whom such a violation occurs be fined under title 18, imprisoned not more than 5 years, or both;
5 years per violation.