Obama created this mess with his Executive Order establishing DACA, which in effect made or changed immigration law. Public servants, especially those with law degrees like Senator Hirono and AG Chin, know that laws can be made and changed by Congress only.  Thus, what Obama did violated the Constitution, yet he had the unanimous support of Democrats in Congress who violated their oaths of office to support and defend the Constitution.  Democrats are now trying to make Trump and Republicans the evil doers for trying to restore Constitutional law to the Federal government.  Trump will be excoriated if he ends DACA. His best course of action will be to allow DACA to continue while the law suit filed by Texas and nine other states works its way to the Supreme Court, where its constitutionality will be decided.  If the Supreme Court rules Obama’s EO unconstitutional, as I believe it will, Democrats will not be able to blame the Trump administration for enforcing immigration laws.