Olney in L.A.
The Trump threat
President Trump is making good on his promise to build a wall. He's also threatening to cut off federal funding to "sanctuary cities." Why he may not be able to keep that promise.
President Trump's promises to build a wall, deport undocumented immigrants and withhold federal funding from sanctuary cities is raising the alarm in the Golden State. California's population includes about 10 million immigrants and a state legislature ready to do battle. Why Trump's promises could face legal challenges.